What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
Enter a class/subclass code here to get a list of patent titles. Use
any of the following forms:
363-131 121-55A 14-.5
that is, no embedded spaces, class and subclass seperated by a dash, and any
subclass letters capitalized. Currently Design Patent titles (those in the
classes of the form Dxx.yy) are not retreivable.
Class Number: 968 Class Title: HOROLOGY Subclases: 381-977 Subclass Subclass Number Title * ****************************** * CROSS-REFERENCE ART COLLECTIONS * ***************************** 381 TIMEPIECES OF WHICH THE INDICATING MEANS OR CASE PROVOKE SPECIAL EFFECTS, E.G., AESTHETIC EFFECTS, ETC. (ornamental shaping of dials subclass 153 special effects and pictures in general B44F) [G04B 45/00] 382 .Light-, colour-, line-, or spot-effects caused by parts or pictures moved by the clockwork (disc-shaped indicating parts subclasses 145 and 163; figures or parts thereof for indicating the time, moved by the clockwork subclass 247) [G04B 45/00B] 383 .Light-, colour-, line- or spot-effects caused by or on stationary parts (change of appearance by exchangeable case parts subclass 409) [G04B 45/00C] 384 .Inscriptions or pictures moved by the clockwork, e.g., for advertising, etc. (clocks with abrupt time indication subclass 85; disc-shaped indicating elements subclasses 145 and 163; advertising in general G09F) [G04B 45/00D] 385 .Inscriptions and pictures moved by hand (clockworks with abrupt time indication subclass 85; adjustable hands or mechanisms subclass 211; combination of clockwork with counter, e.g., for sports results, etc., subclass 381; movable ornaments and decorations subclass 408) [G04B 45/00F] 386 .Figures or parts thereof moved by the clockwork (disc-shaped indicating by moving figures subclass 247; normal moving parts of the clockwork visible through a window, e.g., the escapement, etc., subclass 394) [G04B 45/00H] 387 ..With oscillating motion, in pocket- or wrist watches [G04B 45/00H2] 388 ..With oscillating motion in hanging or standing clockworks such as imitation of a real pendulum [G04B 45/00H3] 389 ..Moving parts of the clockwork e.g., pendulum, hands in special form, mostly constructed as a figure (cases and nonmoving parts of the clockwork in various forms subclass 390; decoration and manufacturing methods therefor, also for moving parts subclass 391; construction of normal pendulums subclass 105; construction of normal hands subclass 143) [G04B 45/00H4] 390 .Cases and movable parts with a special shape (movable parts with a special shape subclass 389; decoration in general, and methods of manufacture thereof subclass 391; cases in general subclass 294; combination with genuine utensils or mounting therein subclass 398) [G04B 45/00K] 391 .Decoration of the case and of parts thereof, e.g., as a method of manufacture thereof, etc. (specially shaped subclasses 389 and 390; decoration with inscriptions and pictures subclass 392; construction of the hands subclass 143; decoration by adding extra pieces to the clockwork subclass 406; coloring by treatment of the surface, e.g., by oxidation C25D) [G04B 45/00M] 392 .Pictures or inscriptions on the case or parts thereof, attaching complete pictures (decoration and manufacture thereof subclass 391; special decorative parts which are attached to the case or other parts subclass 406) [G04B 45/00P] 393 ..Changeable parts (cases or clockworks with holders or as holders subclass 345) [G04B 45/00P2] 394 .Timepieces of which the clockwork is visible partly or wholly (figures or parts thereof moved by the clockwork subclass 391) [G04B 45/02] 395 .Timepieces with invisible drive, e.g., with hands attached to a rotating glass disc, etc. (for advertising G09F 23/00; disc-shaped hands with marks or notches subclass 145) [G04B 45/04] 396 ..Whereby the clockwork is positioned in the hands or pendulum (gearwork subclass 2; pendulums subclass 105; construction of the hands subclass 143) [G04B 45/04B] 397 ..Whereby the driving mechanism of the hand is invisible because of special shielding (construction of the hands subclass 143) [G04B 45/04C] 398 TIMEPIECES COMBINED WITH OTHER ARTICLES WHICH DO NOT INTERFERE WITH THE RUNNING OR THE TIMEKEEPING OF THE TIMEPIECE (with magnifying glass built into the face subclass 368; clockwork cases for special purposes subclass 342; inscriptions or pictures moved by hand subclass 385; specially shaped cases, also imitation utensils subclass 390) [G04B 47/00] 399 .Mounting or fixing to the steering wheel of a vehicle [G04B 47/00B] 400 .Mounting in and combined with adjustable indicating means, e.g., date indicating means adjustable by hand, marks or counters, etc. (calendar clocks subclass 170) [G04B 47/00C] 401 .Combined with a key [G04B 47/00E] 402 .Combined with a lighter [G04B 47/00G] 403 .Combined with a pen [G04B 47/00I] 404 .Installations within mirrors, pictures, furniture or other household articles (see note attached to this subclass) 405 ..In musical instruments or loudspeakers (sounding bodies with chimes subclass 225; in alarm clocks subclass 237; cases with arrangements for enhancing the sound production subclass 303) [G04B 47/02C] 406 .With attached ornaments or amusement apparatus (decorated cases see subclass 381) [G04B 47/04B] 407 ..Fastening of jewels and the like (set on or into numbers subclass 272; jewel bearings subclass 153; setting of jewels and tools therefor A44C; devices for setting jewel bearings subclass 735) [G04B 47/04B] 408 ..Movable decorations and parts thereof (inscriptions and pictures moved by hand subclass 385) [G04B 47/04C] 409 .Changeable decorations and parts thereof, decorations for the case which change the external appearance of the clockwork (see note attached to this subclass) 410 ..Clockwork combined with toys (devices for teaching clock reading G09B 19/12; indicating play time G07C 1/28) [G04B 47/04K] 411 .With attached measuring instruments, e.g., pedometer, barometer, thermometer, or compass, etc. (in combination with a tachometer which winds up the clockwork subclass 64) [G04B 47/06] 412 ..With measuring instruments or calculating scales for indicating relationship between quantity and time (meters for measuring average speed, measuring speed by chronograph G01P; slide rules, and calculating wheels G06G; indicating or recording of quantity-time ratios G01D) [G04B 47/06B] 413 ..With a compass (compasses G01C 17/00) [G04B 47/06K] 414 TIMEPIECES USING THE POSITION OF THE SUN, MOON, OR STARS (devices for fixing the place and time by astronomical observations G01C 21/00) [G04B 49/00] 415 .Sundials (normal dials subclass 147) [G04B 49/02] 416 ..Graduation or shaping of dials [G04B 49/04] 426 WINDING MECHANICAL CLOCKS ELECTRICALLY (winding mechanically subclass 23; electrical winding of spring-driven arrangements for gramophones G11B 19/20) [G04C 1/00] 427 .By electrothermal or electro-pneumatic arrangements [G04C 1/00B] 428 .For clock systems (subclasses 429-434 take precedence) [G04C 1/00F] 429 .By electromagnets [G04C 1/02] 430 ..With snap-acting armature [G04C 1/02B] 431 ...Winding up springs [G04C 1/02B2] 432 ..Having unipolar rotating armature (two-pole or multipole arrangements subclasses 434, 435, and 439) [G04C 1/02C] 433 ..With linearly moving armature [G04C 1/02D] 434 .By electric motors with rotating or with reciprocating movement [G04C 1/04] 435 ..Winding up springs [G04C 1/06] 436 ...By oscillating movement [G04C 1/06B] 437 ...By continuous rotating movement [G04C 1/06C] 438 ...By stepping rotating movement [G04C 1/06D] 439 ..Raising weights [G04C 1/08] 440 ...By oscillating movement [G04C 1/08B] 441 ...By continuously rotating movement [G04C 1/08C] 442 ...By stepping rotating movement [G04C 1/08D] 443 .Protection against overwinding (in mechanical clocks or watches subclasses 16, 36, 38, 66, and 71) [G04C 1/10] 444 ..Of the spring [G04C 1/12] 445 ..Of the weights [G04C 1/14] 446 ELECTROMECHANICAL CLOCKS OR WATCHES INDEPENDENT OF OTHER TIMEPIECES AND IN WHICH THE MOVEMENT IS MAINTAINED BY ELECTRIC MEANS (synchronization subclass 506) [G04C 3/00] 447 .Electromechanical switches for setting or display [G04C 3/00K] 448 ..Position, e.g., inclination dependent switches, etc. [G04C 3/00K2] 449 ..Magnetically controlled [G04C 3/00K3] 450 ..Multiple switches (subclass 449 takes precedence) [G04C 3/00K4] 451 ..Electromechanical contact-making and breaking devices acting as pulse generators for setting [G04C 3/00K5] 452 .Mounting, assembling of components [G04C 3/00M] 453 .Wherein movement is regulated by a pendulum [G04C 3/02] 454 ..Using mechanical coupling (using more than one pendulum subclass 457; using torsion pendulums subclass 464; using conical pendulums subclass 465) [G04C 3/02B] 455 ...With constant impulses [G04C 3/02B2] 456 ..Using other coupling means, e.g., electrostrictive, magnetostrictive, etc.) [G04C 3/02D] 457 ..Using more than one pendulum (synchronization between master and slave pendulums subclass 532) [G04C 3/02K] 458 ..Using electromagnetic coupling between electric power source and pendulum (subclass 464 takes precedence) [G04C 3/027] 459 ...The pendulum controlling contacts and mechanically driving the gear-train (constructional details of contact devices subclasses 545 and 608) [G04C 3/027B] 460 ...The pendulum controlling contacts, thereby electromagnetically driving the gear-train or several gear-trains (generating driving pulses in master-clocks subclass 541) [G04C 3/027C] 461 ...The pendulum controlling contacts, the pendulum driving electromagnet simultaneously driving the gear-train [G04C 3/027D] 462 ...The pendulum controlling indirectly, i.e., without mechanical connection, contacts, e.g., by magnetic or optic means, etc. [G04C 3/027E] 463 ...The pendulum controlling the gear-train by means of static switches, e.g., transistor circuits, etc. [G04C 3/027F] 464 ..Using torsion pendulums; using conical pendulums (construction thereof subclass 103) [G04C 3/033] 465 ...Using conical pendulums (construction thereof subclass 134) [G04C 3/033B] 466 .Wherein movement is regulated by a balance (construction thereof subclass 110) [G04C 3/04] 467 ..Using mechanical coupling [G04C 3/04B] 468 ...With constant impulses [G04C 3/04B2] 469 ...Using other coupling means, e.g., electrostrictive, magnetostrictive, etc. [G04C 3/04D] 470 ..Using electromagnetic coupling between electric power source and balance [G04C 3/06] 471 ...The balance controlling contacts and mechanically driving the gear-train [G04C 3/06B] 472 ...The balance controlling contacts, the gear-train or several gear-trains being driven electromagnetically thereby [G04C 3/06C] 473 ...The balance controlling contacts, the balance driving electromagnet simultaneously driving the gear-train [G04C 3/06D] 474 ...The balance controlling indirectly, i.e., without mechanical connection, contacts, e.g., by magnetic or optic means, etc. [G04C 3/06E] 475 ...The balance controlling gear-train by means of static switches, e.g., transistor circuits, etc. (synchronization of balance subclass 520) [G04C 3/06F] 476 ....Constructional details, e.g., disposition of coils, etc. [G04C 3/06F2] 477 ....Driving circuits with distinct detecting and driving coils [G04C 3/06F3] 478 .....Provided with automatic control [G04C 3/06F3B] 479 ....Driving circuits using a single coil for detection and driving purposes [G04C 3/06F4] 480 .Wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g., by a tuning fork, e.g., electrostatically, etc. [G04C 3/08] 481 ..Driven by electromagnetic means [G04C 3/10] 482 ...Constructional details [G04C 3/10B] 483 ....Of the mechanical oscillator or of the coil [G04C 3/10B2] 484 ....Of the pawl or the ratched-wheel [G04C 3/10B3] 485 .....Pawl and ratched-wheel being magnetically coupled [G04C 3/10B3B] 486 ....Controlling frequency or amplitude of the oscillating system (circuits subclass 487) [G04C 3/10B4] 487 ...Driving circuits [G04C 3/10C] 488 ..Driven by piezoelectric means; driven by magnetostrictive means [G04C 3/12] 489 ...Driven by magnetostrictive means [G04C 3/12B] 490 .Incorporating a stepping motor (subclasses 302 to 488 take precedence) generating timing pulses subclasses 817 and 901; setting subclass 906; synchronization subclass 920; generating commutating pulses in masterclocks subclasses 525 and 541; slave clocks actuated intermittently by electromechanical step-advancing mechanisms subclass 548; control circuits for stepping motors in general H02P 8/00) [G04C 3/14] 491 ..Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g., detection of unwanted or missing step, etc. [G04C 3/14B] 492 ..Incorporating two or more stepping motors or rotors [G04C 3/14C] 493 .Incorporating an electrodynamic continuously rotating motor (subclasses 453 and 488 take precedence; clocks driven by synchronous motors subclass 553) (apparatus which can be set and started to measure off predetermined or adjustable fixed time intervals with electric driving means, e.g., incorporating clocks, etc., subclasses 815 and 816; electromechanical stopwatches subclass 837) [G04C 3/16] 494 ..Comprising a mechanical regulating device influencing the electromotor (constructional details of the mechanical regulating device subclass 103) [G04C 3/16B] 495 .Incorporating electrothermal or electro-pneumatic driving means [G04C 3/18] 496 ELECTRIC OR MAGNETIC MEANS FOR CONVERTING OSCILLATORY TO ROTARY MOTION IN TIMEPIECES, I.E., ELECTRIC OR MAGNETIC ESCAPEMENTS (regulators subclass 446) [G04C 5/00] 497 .Magnetic or electromagnetic means [G04C 5/00B] 498 ELECTRICALLY ACTUATED DEVICES FOR SETTING THE TIME-INDICATING MEANS (of slave clocks subclass 533; of synchronous clocks subclass 561; mechanical setting devices subclass 248; electronic setting devices subclass 906) [G04C 9/00] 499 .Brought into action by radio transmission [G04C 9/02] 500 .By blocking the driving means [G04C 9/04] 501 .By decoupling the driving means (combined with blocking means subclass 500) [G04C 9/06] 502 .By electric drive, i.e., for mechanical clocks [G04C 9/08] 503 ARRANGEMENTS OF ELECTRIC POWER SUPPLIES IN TIMEPIECES (circuits subclass 888; mounting, assembling of components of electromechanical watches subclass 452, of electronic watches subclass 877) [G04C 10/00] 504 .The power supply being a radioactive or photovoltaic source [G04C 10/02] 505 .With means for indicating the condition of the power supply (in general G01R 31/00B) [G04C 10/04] 506 SYNCHRONIZATION OF INDEPENDENTLY DRIVEN CLOCKS (synchronization between master and slave pendulums subclass 532; synchronization of electronic oscillators in general H03L 7/00) [G04C 11/00] 507 .By changing the driving speed [G04C 11/00B] 508 .By changing the ratio of the driving gear [G04C 11/00C] 509 .By positioning of the index or by regulating the length of the pendulum in dependence on the time difference with a standard [G04C 11/00H] 510 .By radio (time setting brought into action by radio subclass 499) [G04C 11/02] 511 ..Provided with arrangements to prevent synchronization by interfering signals [G04C 11/02B] 512 ..The timepiece preparing itself on set times on the reception of the synchronizing signal [G04C 11/02C] 513 .Over a line (transmitting time signals over telephone networks H04M 11/06; time setting subclass 498) [G04C 11/04] 514 ..Provided with arrangements to prevent synchronization by interfering signals [G04C 11/04B] 515 ..The timepiece preparing itself on set time on the reception of the synchronizing signal [G04C 11/04C] 516 .With direct mechanical action on the time-indicating means (time setting subclass 498) [G04C 11/06] 517 .Using an electro-magnet or -motor for oscillation correction [G04C 11/08] 518 ..Using an electromagnet [G04C 11/08K] 519 ...Acting on the pendulum (mutual synchronization of pendulums subclass 532) [G04C 11/08K5] 520 ...Acting on the balance [G04C 11/08K6] 521 ..Using an electromotor [G04C 11/08M] 522 ...Acting on the pendulum (mutual synchronization of pendulums subclass 532) [G04C 11/08M5] 523 ...Acting on the balance [G04C 11/08M6] 524 DRIVING MECHANISMS FOR CLOCKS BY MASTER CLOCKS [G04C 13/00] 525 .Circuit arrangements; electric clock installations [G04C 13/02] 526 ..Master-slave systems using transmission of singular pulses for driving directly slave clocks step-by-step (subclass 533 takes precedence) [G04C 13/02B] 527 ...Via existing power distribution lines [G04C 13/02B2] 528 ...Via existing transmission lines (transmitting time signals over telephone networks H04M 11/06) [G04C 13/02B3] 529 ...Via special lines [G04C 13/02B4] 530 ...By radio [G04C 13/02B5] 531 ..Master-slave systems using transmission of other driving signals, e.g., coded signals, etc. [G04C 13/02F] 532 ..Transmission systems for synchronization of pendulum of slave clocks by pendulums of master clocks [G04C 13/02K] 533 ..Pulse transmission systems with additional means for setting the time indication of slave clocks (subclass 532 takes precedence) [G04C 13/03] 534 ..Master clocks [G04C 13/04] 535 ...Monitoring or controlling master clock or system with more than one master clock, e.g., for switching over to standby motor or power system, etc. [G04C 13/04B] 536 ....By using devices similar to slave clocks [G04C 13/04B2] 537 ....Systems in which slave clocks function as master clocks for other slave clocks (synchronization of independently driven clocks subclass 506; setting subclass 498) [G04C 13/04B3] 538 ...Provided with supplementary means for setting or changing the time indication of the slave clocks [G04C 13/04C] 539 ....For automatically correcting or compensating for disturbances [G04C 13/04C2] 540 ....For automatically setting of slave clocks after correction or after setting of master clock [G04C 13/04C3] 541 ...Arrangements for generating normal driving pulses (generating timing pulses in general subclass 817) [G04C 13/04D] 542 ....By starting an independent mechanical driving device, e.g., motor controlling the contacts, etc. [G04C 13/04D2] 543 ....By switching on an electromagnetic driving device, e.g., electromotor, controlling the contacts, etc. [G04C 13/04D3] 544 ....By using current generating driving device [G04C 13/04D4] 545 ...Contact devices (for simultaneously winding several clocks subclass 426) [G04C 13/06] 546 ....Controlled by a pendulum or a balance [G04C 13/06B] 547 .Slave clocks actuated intermittently [G04C 13/08] 548 ..By electromechanical step-advancing mechanisms (independent clocks or watches incorporating a stepping motor subclass 490; stepping motors in general H02K 33/00) [G04C 13/10] 549 ...Setting the time-indicating means (master-slave systems with setting means subclass 533; adjusting independently driven clocks subclasses 498 and 506) [G04C 13/10C] 550 ...With rotating armature [G04C 13/11] 551 ..By continuously rotating electric motors (independent clocks subclass 493; clocks driven by synchronous motors subclass 553) [G04C 13/12] 552 ..By electrically released mechanical driving mechanisms [G04C 13/14] 553 CLOCKS DRIVEN BY SYNCHRONOUS MOTORS [G04C 15/00] 554 .Without power reserve [G04C 15/00B] 555 ..Provided with hand-actuated starting device [G04C 15/00B2] 556 ..Provided with automatic starting device [G04C 15/00B3] 557 ..Provided with means for indicating disturbance [G04C 15/00B4] 558 ..Provided with means for checking sense of rotation [G04C 15/00B5] 559 .With power reserve [G04C 15/00C] 560 .Synchronous clock systems, e.g., provided with radiolink or using transmission of alternating current via existing power distribution lines, etc. [G04C 15/00H] 561 ..Setting the time-indicating means, e.g., by controlling the frequency or by changing the drive of the separate clocks by using an auxiliary motor, etc. [G04C 15/00H2] 562 ..Automatic stabilization of net frequency with regard to time, e.g., by comparing one of the clocks with an independent clock, means being provided for automatic compensation of disturbances, etc. [G04C 15/00H3] 563 .Lubricating [G04C 15/00T] 564 INDICATING THE TIME OPTICALLY BY ELECTRIC MEANS (subclass 577 takes precedence; by mechanical means subclasses 139 and 162) [G04C 17/00] precedence; by mechanical means subclasses 139 and 162) [G04C 17/00] 565 .By hands [G04C 17/00B] 566 ..With date indication [G04C 17/00B2] 567 .By flaps [G04C 17/00F] 568 ..With date indication [G04C 17/00F2] 569 ..By a combination of different types of indicating devices, e.g., flaps and drums, etc. [G04C 17/00K] 570 .By discs (by drums subclass 573) [G04C 17/00S] 571 ..With date indication [G04C 17/00S2] 572 ...Electromagnetically driven, e.g., intermittently, etc. (clocks incorporating stepping motor subclass 490) [G04C 17/00S2B] 573 .By drums or drumlike devices [G04C 17/00T] 574 ..With date indication [G04C 17/00T2] 575 .Combined electro-optical and electromechanical displays [G04C 17/00V] 576 .By electric lamps [G04C 17/02] 577 PRODUCING OPTICAL TIME SIGNALS AT PREFIXED TIMES BY ELECTRIC MEANS [G04C 19/00] 578 .By electric lamps [G04C 19/02] 579 .By indicating members moved electrically, e.g., flap, band, etc. [G04C 19/04] 580 PRODUCING ACOUSTIC TIME SIGNALS BY ELECTRICAL MEANS (for mechanical clocks or watches subclasses 225 and 243) [G04C 21/00] 581 .Constructional details (subclasses 582 and 588 take precedence) (sound- producing devices in general G10K, e.g., 1/00) [G04C 21/02] 582 .Indicating the time of the day (acoustic indication of time subclass 217) [G04C 21/04] 583 ..By striking mechanism [G04C 21/06] 584 ...With snail [G04C 21/08] 585 ...With locking plate [G04C 21/10] 586 ..By electro-acoustic time means [G04C 21/12] 587 ...Electro-acoustic time announcement, i.e., spoken [G04C 21/14] 588 .Producing the signals at adjustable fixed times [G04C 21/16] 589 ..By mechanically unlocking an electromechanical vibrator, e.g., actuated by the leakage flux of the electric driving means, etc. [G04C 21/18] 590 ...Provided with means for sheeting off or temporarily stopping the signal [G04C 21/20F] 591 ..By closing a contact to ring an electromechanical alarm [G04C 21/20] 592 ...By the hand(s) or handlike members closing the contact [G04C 21/20B] 593 ...Put into action by the arbor of a mechanical alarm work [G04C 21/22] 594 ...Put into action by the spring of a mechanical alarm work [G04C 21/24] 595 ...Put into action by the vibrations caused by the operation of a mechanical alarm work [G04C 21/26] 596 ..By closing a contact to put into action electro-acoustic means, e.g., awakening by music, etc. [G04C 21/28] 597 ..With provision for a number of operations at different times, e.g., ringing the bells in a school, etc. [G04C 21/30] 598 ...By the hand(s) or handlike members closing the contacts [G04C 21/30B] 599 ...Giving indications at a number of places each at a different time, e.g., system of alarms in a hotel, etc. [G04C 21/32] 600 ....By the hand(s) or handlike members closing the contacts [G04C 21/32B] 601 ...Adjustable from the different places themselves [G04C 21/32K] 602 ..Devices on watches or similar portable timepieces [G04C 21/34] 603 ..Signal-repeating devices [G04C 21/36] 604 ..Adjusting the duration of signals [G04C 21/38] 605 CLOCKS WITH ATTACHED OR BUILT-IN MEANS OPERATING ANY DEVICE AT PRESELECTED TIMES OR AFTER PRESELECTED TIME INTERVALS (if restricted to producing acoustic time signals by electrical means subclass 580; mechanical alarm clocks subclass 231; apparatus which can be set and started to measure off predetermined intervals subclass 815; time or time-program switches which automatically terminate their operation after the program is completed H01H 43/00) [G04C 23/00] 606 .Constructional details [G04C 23/02] 607 ..Housings, supports, shielding, or similar stationary parts [G04C 23/04] 608 ..Driving or regulating means [G04C 23/06] 609 ..Programming means [G04C 23/08] 610 ..For actuating any element which operates, or initiates the operation of, the device concerned [G04C 23/10] 611 ..Electric circuitry [G04C 23/12] 612 .Mechanisms continuously running to relate the operation(s) to the time of day [G04C 23/14] 613 ..Acting only at one preselected time or during one adjustable time- interval [G04C 23/16] 614 ..For operating one device at a number of different times [G04C 23/18] 615 ...With contacts operated, or formed by clock hands or elements of similar form [G04C 23/20] 616 ...With the actuating element carried by a disc [G04C 23/22] 617 ....The actuating element controlling another element mechanically [G04C 23/24] 618 ..For operating a number of devices at different times [G04C 23/26] 619 ...With contacts operated, or formed, by clock hands or elements of similar form [G04C 23/28] 620 ...With the actuating element carried by a disc [G04C 23/30] 621 ....The actuating element controlling another element mechanically [G04C 23/32] 622 ..With provision for automatic modification of the program, e.g., on Sunday, etc. [G04C 23/34] 623 ...Some operations being performed at another time [G04C 23/34G] 624 ...Another program being carried out [G04C 23/34H] 625 ...Some operations being overridden [G04C 23/34M] 626 ...By external influences [G04C 23/36] 627 .Mechanisms measuring a chosen time interval independently of the time of day at which interval starts [G04C 23/38] 628 ..Using continuously running mechanism [G04C 23/40] 629 ..Acting only at the end of a single time interval [G04C 23/42] 630 ...With provision for selection from a number of preset intervals [G04C 23/44] 631 ...With provision for adjustment of the interval (subclass 630 takes precedence) [G04C 23/46] 632 ..Acting at the end of successive time intervals [G04C 23/48] 633 ..With provision for modification of the interval(s) by external influences [G04C 23/50] 651 GRIPPING, HOLDING OR SUPPORTING DEVICES (stands in general F16M; for instruments G01D 11/30, B01L) [G04D 1/00] 652 .For assembly entirely by hand [G04D 1/00B] 653 ..Workbenches, supports; workbenches provided with suction devices; for dust; illumination [G04D 1/00B2] 654 ..Supporting means facilitating assembly and mechanization, e.g., magazines for components, etc. (machines for assembly subclass 661; supports in general subclass 680) [G04B 1/00B3] 655 ..Screwdrivers (screwdrivers in general B65B) [G04D 1/00B5] 656 ...With power source for driving the screwdriver [G04D 1/00B5B] 657 ..Tools for setting, riveting or pressing, e.g., nippers for this purpose, etc. (machines therefor subclass 736, 737, and 738) [G04D 1/00B6] 658 .For nonautomatic assembly, with automatic transport between workbenches [G04D 1/00C] 659 ..Conveyor belts or chains (in general B65C) [G04D 1/00C2] 660 ..Turntables or plates, e.g., carousels, etc. (in general B65G 47/00) [G04D 1/00C3] 661 .For totally automated assembly [G04D 1/00D] 662 .Automated gripping means (hand-operated gripping means subclass 665) [G04D 1/00G] 663 ..With pneumatic holding means (hand tools with pneumatic means subclass 665) [G04D 1/00G2] 664 .Devices for positioning and sorting of the components (sorting and positioning in general B23Q) [G04D 1/00H] 665 .Tweezers; vice clamps or other special hand tools for watchmakers (subclasses 673, 683, and 684 take precedence; vices B25B; devices for setting bearing jewels and parts thereof subclass 735; devices for setting watch glasses subclass 739) [G04D 1/02] 666 ..Tweezers (tweezers for medical purposes A61B; setting tools B41B 1/00) [G04D 1/02B] 667 ..Universal nippers (nippers for setting watch glasses digest 742) [G04D 1/02C] 668 ..Revolving-head nippers (jaw plates for latches subclass 726) [G04D 1/02D] 669 ..Hand screws [G04D 1/02F] 670 ..Clamps for holding bearing jewels (machines for setting bearing jewels subclass 685) [G04D 1/02G] 671 ..Hand tools for gripping or holding by magnetic means [G04D 1/02H] 672 ..Hand tools for gripping or holding by pneumatic means [G04D 1/02K] 673 .Tools for setting springs [G04D 1/04] 674 ..For springs of driving mechanisms (machines therefor subclass 710) [G04D 1/04B] 675 ..For coil springs in regulating mechanisms (machines therefor subclass 701) [G04D 1/04C] 676 ...For working the ends (machines therefor subclass 701) [G04D 1/04C2] 677 ...For fastening the ends (machines therefor subclass 701) [G04D 1/04C3] 678 ....On the coil roll [G04D 1/04C3B] 679 ....On the coil bobbin [G04D 1/04C3C] 680 .Supporting devices for clockworks or parts of timepieces (for automatic assembly subclass 654) [G04D 1/06] 681 ..Provided with a pickup means, e.g., microphone, etc. (measuring and control means for comparison with a standard frequency subclass 769) [G04D 1/06B] 682 ..Packaging and boxes for transport (packaging for small items, packaging for special items B65D) [G04D 1/06G] 683 .Tools for setting or removing hands [G04D 1/08] 684 .Devices for opening or closing watch bottoms or covers (machines therefor subclass 685) [G04D 1/10] 685 WATCHMAKER'S OR WATCH-REPAIRER'S MACHINES OR TOOLS FOR WORKING MATERIALS (metal working in general Class B23) [G04D 3/00] 686 .For mechanical working other than with a lathe (lathes for watchmakers subclass 724) [G04D 3/00B] 687 ..For parts of driving means [G04D 3/00B2] 688 ...For springs (springs in general B21F; mainspring construction subclass 10; springs for the regulating mechanism subclass 701) [G04B 3/00B2B] 689 ...For spring barrels (construction of spring barrels subclasses 12 and 14) [G04D 3/00B2C] 690 ..For parts of the winding-up mechanism, e.g., for winding axles, crowns, etc. (construction thereof subclasses 23 and 40) [G04D 3/00B4] 691 ..For components of the pawl construction, stop clicks, clutches (construction thereof subclass 73) [G04D 3/00B6] 692 ..For components of gearworks (construction thereof subclass 85) [G04D 3/00B8B] 693 ...For gear wheels or gears [G04D 3/00B8B] 694 ...For axles or sleeves [G04D 3/00B8C] 695 ...For axle taps, e.g., for grinding or polishing thereof, etc. (on a lathe subclass 724) [G04D 3/00B8D] 696 ..For components of the escape mechanism (construction thereof subclass 95) [G04D 3/00B10] 697 ...For levers [G04D 3/00B10B] 698 ...For lever wheels [G04D 3/00B10C] 699 ..For components of the regulating mechanism [G04D 3/00B12] 700 ...For balances (construction therefor subclass 110) [G04D 3/00B12B] 701 ...For coil-springs (coil-springs in general B12F; springs for the driving mechanism subclass 710) [G04D 3/00B12C] 702 ..For components of the time-indicating mechanisms (construction thereof subclass 139) [G04D 3/00B14] 703 ...For hands (construction thereof subclass 139) [G04D 3/00B14B] 704 ...For dials (construction thereof subclasses 139 and 153) [G04D 3/00B14C] 705 ...For time markers [G04D 3/00B14D] 706 ..For framework components (construction thereof subclass 265) [G04D 3/00B16] 707 ..For bearing components (construction thereof subclass 271) [G04D 3/00B18] 708 ...For bearing jewels (machines for boring through stones B28D; for diamonds B24B; diamond polishing B24B 9/16; manufacture of drawing stones B23P 5/00; setting of industrial stones B23P 15/24) [G04D 3/00B18B] 709 ..For components for protecting the mechanism against external influences (construction thereof subclasses 294 and 377) [G04D 3/00B20] 710 ...For cases [G04D 3/00B20B] 711 ...For the fastening means of the case or bracelet (construction thereof subclass 359) [G04D 3/00B20C] 712 .For working with nonmechanical means, e.g., chemical, electrochemical, metallizing, vaporizing, etc; with electron beams, laser beams [G04D 3/00C] 713 ..For bearing components [G04D 3/00C1] 714 .For treatment of the material, e.g., surface treatment, etc. [G04D 3/00D] 715 ..For components of driving mechanisms, e.g., mainspring, etc. [G04D 3/00D2] 716 ..For gearwork components [G04D 3/00D8] 717 ...For gear wheels or gears [G04D 3/00D8B] 718 ...For axles, sleeves [G04D 3/00D8C] 719 ..For components of the escapement mechanism, e.g., lever escapement, escape wheel, etc. [G04D 3/00D10] 720 ..For components of the regulating mechanism, e.g., coil springs, etc. [G04D 3/00D12] 721 ..For components of the time-indicating mechanism, e.g., dials, etc. [G04D 3/00D14] 722 ..For bearing components [G04D 3/00D18] 723 ..For components of the means protecting the mechanism against external influences, e.g., cases, etc. [G04D 3/00D20] 724 .Lathes, with one or more supports; burnishing machines, with one or more supports (metal lathes B23B; automatic lathes B23B; grinding and polishing in general class B24) [G04D 3/02] 725 ..Components [G04D 3/02B] 726 ...Jaw-plates, revolving-head nippers [G04D 3/02B2] 727 ..For the manufacture of special components for clockworks [G04D 3/02C] 728 ...For gearwork components [G04D 3/02C8] 729 ....For gear wheels or gears [G04D 3/02C8B] 730 ....For axles, sleeves [G04D 3/02C8C] 731 ....For axle taps [G04D 3/02C8D] 732 ...For components of the time-indicating mechanism, e.g., dials, etc. [G04D 3/02C14] 733 ...For bearing components [G04D 3/02C18] 734 ...For components of the means protecting the mechanism from external influences, e.g., cases, etc. [G04D 3/02C20] 735 .Devices for placing bearing jewels, bearing sleeves, or the like in position (fixing jewels A44C 17/04; tools for assembling and taking apart gear wheels and bearing components B25B; machines for the manufacture of bearing jewels and components digest 686) [G04D 3/04] 736 ..For bearing jewels (pressing nippers and handtools subclass 657) [G04D 3/04B] 737 ..For lever, impulse-pin (adjustment of the escapement subclass 760) [G04D 3/04C] 738 ..For the coil rolls or bobbins [G04D 3/04D] 739 .Devices for shaping or setting watch glasses (cutting watch glasses C03B 33/04; grinding and working of spectacle lenses and lenses B24B; working plastic materials in general B29B) [G04D 3/06] 740 ..Shaping without chipping away, e.g., by hot pressing or by punching out the whole piece from a plate, etc. [G04D 3/06B] 741 ..Shaping by removing material, e.g., cutting out from a plate, milling the edges, etc. [G04D 3/06C] 742 ..Setting or taking apart, whereby a temporary deformation of the glass may take place [G04D 3/06D] 743 .Machines or apparatus for cleaning [G04D 3/08] 744 ..Whereby the components to be cleaned are placed in a container [G04D 3/08B] 745 ...Whereby the container rotates in a cleaning fluid [G04D 3/08B2] 746 OILING DEVICES; SPECIAL LUBRICANT CONTAINERS FOR WATCHMAKERS (bearings constructed with regard to oiling of the clockwork subclass 281; oilcans for lubricating in general F16N 3/04) [G04D 5/00] 747 .Oilcans and other handtools for lubricating special parts of the clockwork mechanism [G04D 5/00B] 748 MEASURING, COUNTING, CALIBRATING, TESTING, OR REGULATING APPARATUS (measuring devices and calibers in general G01B; counters in general H03K) [G04D 7/00] 749 .Purely mechanical measuring and testing apparatus [G04D 7/00B] 750 .Electrical measuring and testing apparatus [G04D 7/00C] 751 ..For electric or electronic clocks [G04D 7/00C2] 752 .Optical measuring and testing apparatus [G04D 7/00D] 753 .Counters for small components, e.g., bearing jewels, etc. [G04D 7/00G] 754 .Testing apparatus for complete clockworks with regard to external influences or general good working [G04D 7/00K] 755 ..With regard to the sealing of the case [G04D 7/00K2] 756 ..With regard to the reaction to shocks [G04D 7/00K3] 757 ..With regard to the functioning of the automatic winding-up device [G04D 7/00K4] 758 .For mainsprings [G04D 7/02] 759 .For gearwork, e.g., optical control of gear wheels, etc. (optical control in general G01B, G01B 9/08) [G04D 7/04] 760 .For escapements [G04D 7/06] 761 .For balance wheels [G04D 7/08] 762 ..For adjusting the felloe or the shafts (adjustment of the gear wheels subclass 759) [G04D 7/08B] 763 ..For balancing [G04D 7/08C] 764 ...By setting adjustable elements, e.g., balance wheel screws, etc. [G04D 7/08C2] 765 ...By removing material from the balance wheel itself [G04D 7/08C3] 766 ....Automatic devices therefor (balancing and loading or removing, carried out automatically) [G04D 7/08C3B] 767 ...By loading the balance wheel itself with material [G04D 7/08C4] 768 .For hairsprings of balances [G04D 7/10] 769 .Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard (supporting devices for clocks with built-in recording apparatus subclass 681; measuring short time intervals subclass 844; frequency measuring in general H04B, G01R) [G04D 7/12] 770 ..Only for measuring [G04D 7/12B] 771 ...For complete clockworks [G04D 7/12B2] 772 ....With recording, e.g., vibrograph, etc. [G04D 7/12B2B] 773 .....Devices for facilitating the reading or the interpretation of the recording [G04D 7/12B2B2] 774 ...For the control mechanism only found from outside the clockwork [G04D 7/12B3] 775 ....For measuring amplitude [G04D 7/12B3B] 776 ....For measuring frequency [G04D 7/12B3C] 777 ..Wherein further adjustment devices are present [G04D 7/12C] 778 ...For complete clockworks [G04D 7/12C2] 779 ...For the control mechanism only from outside the clockwork [G04D 7/12C3] 780 ....Whereby the adjustment device works on the compass [G04D 7/12C3B] 781 ....Whereby the adjustment device works on the mainspring [G04D 7/12C3C] 782 ....Whereby the adjustment device works on the balance wheel [G04D 7/12C3D] 783 DEMAGNETIZING DEVICES (demagnetizing in general H01F 13/00) [G04D 9/00] 801 APPARATUS WHICH CAN BE SET AND STARTED TO MEASURE OFF PREDETERMINED OR ADJUSTABLY FIXED TIME INTERVALS WITHOUT DRIVING MECHANISMS, E.G., EGG TIMER, ETC. (electric time and time-program switches H01H 43/00) [G04F 1/00] 802 .Using electronic timing, e.g., counting means, etc. (pulse time delay arrangements H03K 5/13; modifications of electronic switches for introducing a time delay before switching H03K 17/28) [G04F 1/00B] 803 .By consuming prefixed quantities of materials, e.g., by burning candle, etc. [G04F 1/02] 804 .By movement or acceleration due to gravity [G04F 1/04] 805 ..By flowing away of a prefixed quantity of fine granular or liquid materials, e.g., sand-glass, water-clock, etc. [G04F 1/06] 806 ...Using acoustic signalling [G04F 1/06B] 807 ...Using electrical contact device [G04F 1/06C] 808 ..By a body falling a prefixed distance in air or in a viscous material [G04F 1/08] 809 APPARATUS WHICH CAN BE SET AND STARTED TO MEASURE OFF PREDETERMINED OR ADJUSTABLY FIXED TIME INTERVALS WITH DRIVING MECHANISMS, E.G., DOSIMETER WITH CLOCKWORK, ETC. (electric time or time-program switches H01H 43/00) [G04F 3/00] 810 .With mechanical driving mechanisms [G04F 3/02] 811 ..Using mechanical signaling device [G04F 3/02B] 812 ..Mechanically actuated (cigar or cigarette receptacles or boxes with means for limiting the frequency of smoking A24F 15/00B) [G04F 3/02C] 813 ..Using electrical contacts, e.g., for actuating electro-acoustic device, etc. [G04F 3/02D] 814 ..Additional arrangements in connection with ordinary nonelectric clocks for this purpose [G04F 3/04] 815 .With electric driving mechanisms [G04F 3/06] 816 ..Additional arrangements in connection with ordinary electric clocks for this purpose [G04F 3/08] 817 APPARATUS FOR PRODUCING PRESELECTED TIME INTERVALS FOR USE AS TIMING STANDARDS (generating clock signals for electric digital computers G06F 1/04; regulating frequency in general H03C, L) [G04F 5/00] 818 .Metronomes (periodic signalization by acoustic signals in general subclass 218) [G04F 5/02] 819 ..Mechanic metronomes [G04F 5/02B] 820 ..Electronic metronomes (rhythm generation for electrophonic musical instruments G10H 1/36) [G04F 5/02C] 821 ..Using electromechanical driving, e.g., of optical scanned recordings, etc. (electrophonic musical instruments in which tones are generated by electromechanical means, e.g., by using pickup means for reading recorded waves, etc. G10H 3/00) [G04F 5/02D] 822 .Using oscillators with electromechanical resonators (producing electric oscillations or timing pulses [G04F 5/04] 823 ..Using piezoelectric resonators [G04F 5/06] 824 ...Constructional details (details of resonators in general H03H 9/02) [G043F 5/06B] 825 ....Trimmer condensators (capacitors in general H01G) [G04F 5/06B2] 826 ..Using magnetostrictive resonators [G04F 5/08] 827 .Using electric or electronic resonators (subclass 829 takes precedence) [G04F 5/10] 828 .Using fluidic devices [G04F 5/12] 829 .Using atomic clocks [G04F 5/14] 830 .Using pulses produced by radioisotopes [G04F 5/16] 831 APPARATUS FOR MEASURING UNKNOWN TIME INTERVALS BY MECHANICAL MEANS [G04F 7/00] 832 .By measuring the distance of fall or the final velocity of a falling body [G04F 7/02] 833 .Using a mechanical oscillator [G04F 7/04] 834 ..Running only during the time interval to be measured, e.g., stopwatch, etc. [G04F 7/06] 835 ..Watches or clocks with stop devices, e.g., chronograph, etc. [G04F 7/08] 836 .Means used apart from the timepiece for starting or stopping same [G04F 7/10] 837 APPARATUS FOR MEASURING UNKNOWN TIME INTERVALS BY ELECTROMECHANICAL MEANS [G04F 8/00] 838 .Using continuously running driving means [G04F 8/00B] 839 .Running only during the time intervals to be measured, e.g., stopwatch, etc. [G04F 8/00C] 840 .Using an electromechanical oscillator (subclasses 817 and 844 take precedence) [G04F 8/02] 841 ..Using a piezoelectric oscillator [G04F 8/04] 842 ..Using a magnetostrictive oscillator [G04F 8/06] 843 .Means used apart from the timepiece for starting or stopping same [G04F 8/08] 844 APPARATUS FOR MEASURING UNKNOWN TIME INTERVALS BY ELECTRIC MEANS (timing devices for clocks or watches for comparing the rate of the oscillating member with a standard subclass 769; radar systems, analogous systems G01S 9/00; measuring frequency G01R 23/00; measuring phase angle G01R 25/00) [G04F 10/00] 845 .Using oscillators with passive electric resonator, e.g., lumped LC, etc. (subclasses 846, 847, and 849 take precedence) [G04F 10/02] 846 .By counting pulses or half cycles of an alternating current [G04F 10/04] 847 .By measuring phase [G04F 10/06] 848 .Using pulses produced by radioisotopes [G04F 10/08] 849 .By measuring electric or magnetic quantities changing in proportion to time [G04F 10/10] 850 ..With conversion of the time intervals [G04F 10/10B] 851 APPARATUS FOR MEASURING UNKNOWN TIME INTERVALS BY MEANS NOT PROVIDED FOR IN SUBCLASS 817 TO SUBCLASS 844 [G04F 13/00] 852 .Using optical means [G04F 13/02] 853 ..Using cathode-ray oscilloscopes (circuits for inserting reference time markers for cathode-ray oscilloscopes G01R 13/30B) [G04F 13/02B] 854 ..Measuring duration of ultrashort light pulses, e.g., in the picosecond range, etc; particular detecting devices therefor (nonlinear optics G02F 1/35; monitoring arrangements for lasers in general H01S 3/00D; photometry, radiation pyrometry G01J 1/00, 5/00) [G04F 13/02C] 855 .Using electrochemical means [G04F 13/04] 856 .Using fluidic means [G04F 13/06] 876 SUBJECT MATTER NOT PROVIDED FOR IN SUBCLASSES 901 TO 975, E.G., INTEGRATED CIRCUITS FOR ELECTRONIC TIMEPIECES [G04G 1/00] 877 .Structural aspects; housings; aesthetical aspects [G04F 1/00B] 878 ..Assembly of components [G04G 1/00B2] 879 ...Mounting of electronic components [G04G 1/00B2B] 880 ....Mounting of the display [G04G 1/00B2B2] 881 ...Electric connectors, e.g., conductive elastomers, etc. [G04G 1/00B2C] 882 ..Housings [G04G 1/00B3] 883 ...Watches distributed over several housings [G04G 1/00B3B] 884 ...Desktop clocks [G04G 1/00B3C] 885 ..Timepieces combined with an external data detector [G04G 1/00B4] 886 ...For measuring physiological data [G04G 1/00B4B] 887 ..Timepieces combined with games [G04G 1/00B5] 888 .Electric power supply circuits (in general H02M 1/00) [G04G 1/00C] 889 ..Conversion or regulation of current or voltage [G04G 1/00C2] 890 ...Capacitive voltage division or multiplication [G04G 1/00C2B] 891 ...Regulation [G04G 1/00C2C] 892 ..Preventing voltage drop due to overloading the power supply [G04G 1/00C4] 893 ..Backup power supply [G04G 1/00C5] 894 ..Reducing power consumption during the storage of the watch [G04G 1/00C6] 895 .Input or output device integrated in a timepiece [G04G 1/00D] 896 ..Using radiowaves (setting by radio subclass 907; synchronization by radio subclass 922; transmission of control signal subclass 926) [G04G 1/00D2] 897 ..Using voice (producing acoustic time signals subclass 968) [G04G 1/00D3] 898 .Pulse shaping; amplification [G04G 1/00E] 899 .Touch switches particularly adapted to timepieces (in general H03K 17/96) [G04G 1/00K] 900 .Electronic timepieces using a microcomputer, e.g., for multifunction clocks, etc. [G04G 1/00M] 901 PRODUCING TIMING PULSES (driving circuits for stepping motors subclass 490; producing preselected time intervals for use as timing standards subclass 817; pulse technique in general H03K; control, synchronization, or stabilization of generators in general H03L) [G04G 3/00] 902 .Circuits for deriving low frequency timing pulses from pulses of higher frequency (pulse frequency dividers in general H03K 23/00 to 29/00) [G04F 3/02] 903 ..The desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses (in general G06F 7/68) [G04G 3/02B] 904 ..By storing time and date which are periodically investigated and modified accordingly, e.g., by using cyclic shift registers, etc. [G04G 3/02D] 905 ..By combining pulse trains of different frequencies, e.g., obtained from two independent oscillators or from a common oscillator by means of different frequency dividing ratios, etc. (synchronization of electric timepieces subclasses 506 and 920) [G04G 3/02E] 906 SETTING, I.E., CORRECTING OR CHANGING THE TIME-INDICATION (synchronization combined with automatic setting at regular intervals, e.g., by coded signals, etc., subclass 920) [G04G 5/00] 907 .Brought into action by radio [G04G 5/00B] 908 .Debouncing circuits [G04G 5/00C] 909 .By using a separate register into which the entire correct setting is introduced, which is thereafter transferred to the time counters [G04G 5/00D] 910 .By temporarily changing the number of pulses per unit time, e.g., quick-feed method, etc. [G04G 5/02] 911 ..Quick-feed method [G04G 5/02B] 912 ...The time counters first being reset to zero [G04G 5/02B2] 913 ..By adding or suppressing individual pulses, e.g., for step-motor, etc. [G04G 5/02C] 914 .By setting each of the displayed values, e.g., date, hour, etc. independently [G04G 5/04] 915 ..Correction of the minutes counter in function of the seconds counter position at zero adjustment of the latter [G04G 5/04B] 916 ..Using a commutating device for selecting the value, e.g., hours, minutes, seconds, etc. to be corrected [G04G 5/04C] 917 ...Using a sequential electronic commutator [G04G 5/04C2] 918 ....By using a separate register into which the correct setting of one of the counters is introduced which is thereafter transferred to the selected time counter to be reset [G04G 5/04C2D] 919 ...By using a separate register into which the correct setting of the selected time counter is introduced which is thereafter transferred to the time counter to be reset [G04G 5/04C3] 920 SYNCHRONIZATION [G04G 7/00] 921 .Provided with arrangements to prevent synchronization by interfering signals [G04G 7/00B] 922 .By radio [G04G 7/02] 923 ..Provided with arrangements to prevent synchronization by interfering signals [G04G 7/02B] 924 ..The timepiece preparing itself on set times on the reception of the synchronizing signal [G04G 7/02C] 925 VISUAL TIME- OR DATE-INDICATION MEANS [G04G 9/00] 926 .Transmission of control signals [G04G 9/00] 927 ..Using coded signals (synchronization combined with automatic setting at regular intervals, e.g., by coded signals, etc. subclass 920) [G04G 9/00B2] 928 .In which the light emitting display elements may be activated at will or are controlled in accordance with the ambient light [G04G 9/00C] 929 .By light valves in general (subclasses 950 and 962 take precedence; electro-, magneto-, or acoustic-optic devices in general G02F 1/00) [G04G 9/00D] 930 ..Details [G04G 9/00D1] 931 ...Constructional [G04G 9/00D1B] 932 ....Illumination devices [G04G 9/00D1B2] 933 ...Electrical, e.g., selection or application of the operating voltage, etc. [G04G 9/00D1C] 934 ....Using means to adjust the display in accordance with the ambient light, e.g., switching or controlling a supplementary light source, etc. [G04G 9/00D1C2] 935 .Using a cathode-ray tube as display device (displaying supplementary information, such as, time on TV screen H04N 5/445) [G04G 9/00E] 936 .In which functions not related to time can be displayed (digital output to display devices of digital computers G06F 3/14) [G04G 9/00F] 937 ..Combined with a calculator or computing means [G04G 9/00F2] 938 .In which the time in another time zone or in another city can be displayed at will [G04G 9/00G] 939 .By building up characters using a combination of indicating elements and by selecting desired characters out of a number of characters or by selecting indicating elements the positions of which represent the time (this subclass is a combination of subclasses 942 and 954) [G04G 9/00H] 940 ..By controlling light sources, e.g., electroluminescent diodes, etc. [G04G 9/00H2] 941 ..Using light valves, e.g., liquid crystals, etc. [G04G 9/00H3] 942 .By selecting desired character out of a number of characters or by selecting indicating elements the position of which represent the time, e.g., by using multiplexing techniques, etc. [G04G 9/02] 943 ..Using multiplexing techniques [G04G 9/02B] 944 ..Provided with date indication [G04G 9/02C] 945 ..Provided with means for displaying at will a time indication or a date or a part thereof [G04G 9/02D] 946 ..By controlling light sources, e.g., electroluminescent diodes, etc. (subclass 935 takes precedence) [G04G 9/04] 947 ...Using multiplexing techniques [G04G 9/04] 948 ...Provided with date indication [G04G 9/04C] 949 ...Provided with means for displaying at will a time-indication or a date or a part thereof [G04G 9/04D] 950 ..Using light valves, e.g., liquid crystals, etc. [G04G 9/06] 951 ...Using multiplexing techniques [G04G 9/06B] 952 ...Using a drop of liquid suspended by capillary forces and moved by an electric field [G04G 9/06F] 953 ...Using mechano-optical means [G04G 9/06G] 954 .By building up characters using a combination of indicating elements, e.g., by using multiplexing techniques, etc. [G04G 9/08] 955 ..Using multiplexing techniques [G04G 9/08B] 956 ..Provided with date indication [G04G 9/08C] 957 ..Provided with means for displaying at will a time indication or a date or a part thereof [G04G 9/08D] 958 ..By controlling light sources, e.g., electroluminescent diodes, etc. (subclass 935 takes precedence) [G04G 9/10] 959 ...Using multiplexing techniques [G04G 9/10B] 960 ...Provided with date indication [G04G 9/10C] 961 ...Provided with means for displaying at will a time indication or a date or a part thereof [G04G 9/10D] 962 ..Using light valves, e.g., liquid crystals, etc. [G04G 9/12] 963 ...Using multiplexing techniques [G04G 9/12B] 964 ...Provided with date indication [G04G 9/12C] 965 ...Provided with means for displaying at will a time indication or a date or a part thereof [G04G 9/12D] 966 ...Using mechano-optical means [G04G 9/12G] 967 PRODUCING OPTICAL SIGNALS AT PRESELECTED TIMES [G04G 11/00] 968 PRODUCING ACOUSTIC TIME SIGNALS [G04G 13/00] 969 .At preselected times, e.g., alarm clocks, etc. [G04G 13/02] 970 ..Details [G04G 13/02A] 971 ...Adjusting the duration and/or amplitude of signals [G04G 13/02A2] 972 ..Acting only at one preselected time [G04G 13/02B] 973 ..Acting at a number of different times [G04G 13/02C] 974 ..Combined with a radio [G04G 13/02D] 975 TIMEPIECES COMPRISING MEANS TO BE OPERATED AT PRESELECTED TIMES OR AFTER PRESELECTED TIME INTERVALS (subclasses 967 and 968 take precedence; pulse delay circuits H03K 5/13; electronic time delay switches H03K 17/28; electronic time program switches which automatically terminate their operation after the program is completed H03K 17/296; electronic timers digest 802) [G04G 15/00] 976 .Acting only at one preselected time or during one adjustable time interval [G04G 15/00B] 977 .For operating at a number of different times (cigar or cigarette receptacles or boxes with means for limiting the frequency of smoking A24F 15/00B) [G04G 15/00C] * ****************************** * DIGEST * ****************************** DIG 1 PAPER COPIES IN NUMERICAL ORDER OF ALL U.S. PATENTS IN SUBCLASSES 2-977