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: 322 Class Title: ELECTRICITY: SINGLE GENERATOR SYSTEMS Subclass Subclass Number Title 1 PORTABLY MOUNTED 2 R NONMAGNETIC-TYPE GENERATOR 2 A .Electrostatic 3 RECIPROCATING AND/OR OSCILLATING-TYPE GENERATOR 4 WITH FLYWHEELS OR MASSIVE MOVING PARTS 5 WITH GENERATOR POLARITY CONTROL 6 .By control of excitation 7 COMBINED CONTROL OF GENERATING MEANS AND LOAD CIRCUIT 8 .Including load circuit-making and breaking 9 PLURAL DRIVING MEANS 10 WITH PHYSICAL STARTING AND/OR STOPPING OF THE GENERATOR 11 .Automatic in response to predetermined conditions 12 .Connecting and/or disconnecting generator and driving means 13 .Electric motor as driving means 14 COMBINED CONTROL OF GENERATOR AND DRIVING MEANS 15 .Simultaneous control 16 ..Electric motor 17 AUTOMATIC CONTROL OF GENERATOR OR DRIVING MEANS 18 .With time-delay in the response 19 .Antihunting or rate of change 20 .Power factor or phase relationships 21 .With line-drop compensation 22 .Plural conditions 23 ..Including an electrical condition 24 ...Plural electrical conditions 25 ....Voltage and current 26 .Light or photosensitive control circuits 27 .Current output 28 .Voltage of generator or circuit supplied 29 .Speed or frequency of generator 30 ..Centrifugal of fly weight governor 31 ..Tachometer devices 32 ..Frequency responsive devices or networks 33 .Thermal conditions 34 ..In generator and/or driving means 35 .Fluid pressure including wind 36 .With respect to a reference or master device or quantity 37 .Electrical conditions in circuit other than that of generator being controlled 38 DRIVING MEANS CONTROL 39 .Electric motor control 40 POWER TRANSMITTING MECHANISM CONTROL 41 .Friction-type transmission 42 ..Belt drive 43 ...Slip control 44 GENERATOR CONTROL 45 .Combined diverse generator controls 46 .Combined permanent magnet and wound field structure 47 .Induction generator 48 .Acyclic or homopolar-type generator 49 .Magnetic structure 50 ..Magnetic shunt for field fluxx 51 ..Rotor element 52 ..Stator element 53 .Odd number of brushes (e.g., 3rd brush type) 54 .Adjustable current-collecting mechanism 55 ..Movable circumferentially 56 ...Continuously 57 .With nonexciting saturating means for generator structure 58 .With means for suppressing, eliminating or minimizing undesired frequencies 59 .With excitation winding and/or circuit control 60 ..Substitute or auxiliary starting source of excitation 61 ..Alternating current excitation 62 ..Plural sets of poles type of generator 63 ..Plural excitation windings 64 ...Differentially related 65 ...Interpole windings 66 ...Compensating windings 67 ..Series-wound generator 68 ..Short circuiting of field winding 69 ..Circuit interruption 70 ...Continuous make and break 71 ..Variable length field winding 72 ..Control by electric space discharge 73 ...Discharge control discharge device 74 ...Electric arc 75 ..Control by circuit impedance 76 ...Plural impedances 77 ....Bridge arrangements 78 ....Tuned or resonant 79 ...Unidirectionally conductive 80 ...Resistance 81 ....Thermally varied resistance 82 ....Pressure-varied resistance 83 ....Short-circuited 84 .....Continuous make and break 85 .....Step by step 86 ..Plural sources of excitation voltage 87 ...Dynamoelectric source 88 ...Battery source 89 .With armature or primary circuit control 90 ..Plural armature circuits or windings 91 ..Short-circuiting of windings 92 ...By auxiliary brushes diametrically opposed or 180 electrical degrees apart 93 ..Tapped or sectionalized 94 ..Circuit-making and/or breaking 95 ..By armature circuit impedance 96 ...Plural impedances 97 ...Resistance control 98 ....In circuit across brushes or in shunt to generator 99 WITH SIGNALS, INDICATORS, RECORDERS, TESTING, ETC. 100 MISCELLANEOUS * ****************************** * DIGESTS * ****************************** DIG 2 Generator field current-responsive systems DIG 5 Hall effects elements DIG 6 Ripple sensitivee