PTO Manual of Classification for US patents

PTO Manual of Classification for US patents

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.


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363-131 121-55A 14-.5
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Class Number: 328
 Class Title: MISCELLANEOUS ELECTRON SPACE DISCHARGE DEVICE SYSTEMS

Subclass  Subclass
Number    Title

  1       WITH MEANS RESPONSIVE TO EXTERNAL NONELECTRICAL CONDITION
  2       .Light responsive
  3       .Temperature responsive
  4       .Moisture responsive
  5       .Responsive to approach or passage of an object
  6       .Flame responsive (e.g., flame acts as a rectifier in circuit)
  7       WITH PROTECTIVE DEVICES FOR PERSONNEL
  8       WITH PROTECTIVE MEANS FOR TUBES (E.G., AGAINST OVERLOAD, POWER
           SURGE)
  9       .With control means for plate voltage or current
  10      .With means to limit grid voltage and/or current
  11      .Temperature control
  12      WITH DIVERSE-TYPE ART DEVICE
  13      WAVE CONVERSION SYSTEM (E.G., SINE WAVE TO PULSE WAVE)
  14      .With synthesizing or quantizing means
  15      .Frequency conversion systems
  16      ..Harmonic or subharmonic generating means
  17      ...With plural outputs
  18      ....Selectively
  19      ...With particular tube and/or distributed parameter elements
  20      ..Frequency doubling means
  21      .A.C. wave input to A.C. wave output
  22      ..With plural conversion means (e.g., sine wave to sawtooth) to
             sine wave
  23      ..With harmonic adding means
  24      ..With phase conversion means (i.e., M-phase to N-phase)
  25      ..With frequency dividing means
  26      .A.C. wave input to rectified output
  27      .Pulse wave input to A.C. wave output
  28      .A.C. wave input to complex or pulse wave output
  29      ..With plural pulse train outputs
  30      ..With frequency dividing means
  31      ..With amplitude control and/or limiting means
  32      ..With rectifier means
  33      ..With saturable inductance means
  34      .Pulse wave input to pulse wave output
  35      ..Rectangular pulse to sawtooth pulse
  36      ..With plural conversions (e.g., triangular to sawtooth to
             square wave)
  38.1    ..With pulse frequency multiplying means (i.e., single
             pulse successive pulse output)
  53      ..With amplitude variation means (i.e., one pulse height to
             another)
  54      ...With limiting and/or clipping means
  55      ..With pulse delay and/or phase control means
  56      ...With passive delay line means
  57      ..Plural pulse output with opposite polarities
  58      ..With duration control means (e.g., pulse stretching)
  59      PULSE GENERATING MEANS
  60      .With plural paths in network
  61      ..With common output
  62      .With plural outputss
  63      .With synchronizing or timing means
  64      .With electron beam-type tube
  65      .With electromagnetic pulse forming means
  66      .Delay line and/or capacitor storage means charged or discharged
            through or by a relaxation oscillator-type circuit
  67      .Delay line or capacitor storage means charges or discharges
            through a tube
  68      ..With relaxation oscillator in input of discharge tube
  69      CONTROL SYSTEMS
  70      .Plurality of load devices
  71      .With plural paths in circuits
  72      .With timing and/or synchronizing means
  73      ..Intermittent control
  74      ..With pulse forming means
  75      ..Sequencing means
  76      .Electron switching tube discharge path in series with an
            electrical circuit
  77      ..With timing means
  78      ...Utilizing a plurality of capacitor charging and discharging
              means
  79      ..Plural tubes complete plural separate circuit means
  80      ..Plural tubes complete single circuit means
  81      ...Tubes connected in inverse parallel
  82      ..Single tube completes circuit
  83      ...Responsive to plurality of control signals
  84      ...Gaseous tube
  85      .Electron tube controls external circuit control means
  86      ..With timing means (closing means)
  87      ...With mechanical switching means in control circuit of tube
  88      ..Plural tubes with plural electromagnetic circuit control
             means
  89      ..Plural tubes with single electromagnetic circuit control
             means
  90      ..Single tube
  91      .Electron tube gating means
  95      ..Plural gating means
  96      ...Parallel-connected
  97      ...Selectively operated
  98      ..With cathode follower output
  99      ..With inhibiting means
  100     ..Shunt-controlled
  101     ..Plural tube gating means (single gate)
  102     ..Single tube gating means
  103     DISTRIBUTION AND COMBINING SYSTEMS
  104     .Plural channel input to single channel output
  105     .Single channel input to plural channel output
  106     ..Plural tube stages successively or sequentially conducting
  107     ..Single tube with plurality of outputs
  108     PULSE CHARACTERISTIC SELECTING MEANS
  109     .By time or phase relationship
  110     ..With coincidence means
  111     .By width
  112     ..With plural paths in circuit
  113     ..With shock-excited circuit
  114     .By shape or slope
  115     .By amplitude
  116     ..With plural channels
  117     ...With combining means in outputt
  118     .By polarity
  119     .With decoding means
  120     .Missing pulse detecting means
  121     STORAGE SYSTEMS INCLUDING A TUBE OR TUBES
  122     .With plural cascaded stage storage means
  123     .Cathode ray tube storage means
  124     ..With storage scan and/or reading scan means
  125     .Gas tube means
  126     .With single tube storage means
  127     INTEGRATING OR DIFFERENTIATING NETWORKS
  128     .With single tube (e.g., Miller integrator type)
  129.1   WITH TIME INTERVAL DETERMINING MEANS
  130.1   .Plurality of intervals sequentially
  131.1   .With electromechanical relay means
  132     OUTPUT INDICATIVE OF RATE OF CHANGE OR INPUT VOLTAGE
  133     OUTPUT IS A FUNCTION OF PHASE OR FREQUENCY DIFFERENCE BETWEEN
           PLURAL INPUT SIGNALS (E.G., SYNCHRONOUS DETECTORS)
  134     .Fixed frequency reference compared with a variable frequency
  135     OUTPUT IS A FUNCTION OF DIFFERENCE IN AMPLITUDE BETWEEN TWO
           CHARACTERISTICS OF OR POINTS ON A SINGLE INPUT WAVE
  136     OUTPUT IS A FUNCTION OF A SPECIFIC OR PREDETERMINED NUMBER OF
           COMPLETE CYCLES OF AN A.C. INPUT WAVE
  137     OUTPUT IS A SELECTED ONE OF A PLURALITY OF SIMULTANEOUSLY
           APPLIED INPUT SIGNAL WAVES
  138     OUTPUT IS PRESENT ONLY AT A PREDETERMINED FREQUENCY OF A SIGNAL
           INPUT
  139     OUTPUT IS A FUNCTION OF A PRESELECTED SIGNAL COMPONENT IN A
           COMPOSITE WAVE INPUT (E.G., SYNCHRONIZING PULSE SEPARATORS)
  140     OUTPUT IS A FUNCTION OF FREQUENCY REPETITION RATE OR POLARITY OF
           A SINGLE INPUT
  141     .Output proportional to the deviation from a reference
            frequency
  142     WITH OUTPUT AS A NONLINEAR FUNCTION OF INPUT
  143     .With plural channels in circuit
  144     .Output indicative of square law function or input (as either
            square or square root)
  145     .Output a logarithmic function of input
  146     VOLTAGE SIGNAL AMPLITUDE COMPARISON MEANS
  147     .With plural paths in circuit
  148     .With indicating means
  149     .With filter and/or detector means
  150     WITH OUTPUT REPRESENTATIVE OF OR DEPENDENT UPON A PARTICULAR OR
           INSTANTANEOUS AMPLITUDE OF THE INPUT
  151     .With sampling and/or storage means in circuit
  152     CHANNEL SELECTING MEANS
  153     .With single input, plural output
  154     .With plural input, single output
  155     PHASE CORRECTION OR CONTROL SYSTEMS
  156     OUTPUT A COMPOSITE OF A PLURALITY OF INPUTS
  157     .Pulse wave inputs
  158     OUTPUT A RESULTANT FUNCTION OF A PLURALITY OF INPUTS
  159     .Sum and carry systems (e.g., half adders)
  160     .Output is product of plural inputs
  161     .Output is quotient of plural inputs
  162     DISTORTION MEASURING AND/OR CORRECTION MEANS
  163     .With plural channels
  164     .With pulse regenerating means
  165     UNWANTED WAVE COMPONENT ELIMINATING MEANSS
  166     .Quadrature component selection or rejection
  167     .With filter means
  168     AMPLITUDE CONTROL MEANS
  169     .With amplitude limiting means
  170     ..With tuned circuit means
  171     ..With rectifier and/or nonlinear impedance
  172     .With means to control current in the output
  173     .With means to maintain constant level output
  175     ..With feedback means
  176     WITH BOOTSTRAP CIRCUIT MEANS
  177     ELECTRON TUBE DELAY MEANS
  178     WITH PARTICULAR WAVE OUTPUT
  179     .With synchronizing means
  180     .With plural outputs
  181     .Sawtooth or triangular wave output
  182     ..With cathode follower
  183     ..With constant current means in circuit
  184     ..With linearization means
  185     ..With slope and/or duration control means
  186     .With step wave output
  187     .With TV signal or complex pulse wave output
  188     .With test pattern waveform
  189     .With marker pulse wave output
  190     WITH PARTICULAR CIRCUIT MEANS
  191     .Plural stages including multivibrator type
  192     ..With feedback means between stages
  193     .Multivibrator type
  194     ..With control tube
  195     ..With gating means
  196     ..With particular pulsing or triggering means
  197     ..With further tube in output
  198     ..With transistor in tube circuit
  199     ..With diverse-type tubes
  200     ..With gross coupling through a tube or tubes
  201     ..With synchronizing means
  202     ..With tubes in series (e.g., cascade connected)
  203     ..With cathodes connected
  204     ..With output control means
  205     ..With three or more conditions of equilibrium
  206     ..Bistable type
  207     ..Monostable type
  208     .With bridge circuit
  209     .With particular feedback means
  210     .With gaseous tube
  211     ..With particular electrode arrangement
  212     .With diverse-type vacuum tubes
  213     .With cathode follower
  214     .Tube or tubes perform plural functions
  215     .With oscillation prevention means
  216     .With distributed parameter circuit
  217     .With plate supply voltage variation compensation means
  218     .With equipotential surface cathode heating means
  219     .Control circuit utilizes internal tube structure
  220     .With space charge grid (e.g., virtual cathode)
  221     .With particular coupling or decoupling means
  222     .With particular connecting means
  223     .Including oscillatory or shock-excited circuit
  224     .One tube acts as a standby for anotherr
  225     .With particular grid control means
  226     .With particular bias means
  227     .Including electron or other charged particle beam tube
  228     ..With beam focusing, centering or dispersing means
  229     ..With beam deflecting means
  230     ...Magnetic
  231     ..Cathode ray type
  232     ..Klystron type
  233     ..With particle accelerating or decelerating means
  234     ...Cyclotron type
  235     ...Synchrotron type
  236     ...Bevatron type
  237     ...Betatron type
  238     ...Rotatron type
  239     .With speaker field coil
  240     .With hum or microphonic eliminating means
  241     .Negative resistance type
  242     ..Secondary emissive type
  243     ..Electron multiplier type
  244     ..Magnetic field-controlled type
  245     .With retarding field means (e.g., Barkhausen-Kurz)
  246     .Single tube
  247     ..Triggered circuit
  248     ...Bistable (e.g., phantastron)
  249     WITH PARTICULAR TUBE STRUCTURE
  250     .Gas tube
  251     ..With particular electrode arrangement
  252     .Vacuum tube type
  253     ..Magnetically controlled
  254     ..Beam tube structure
  255     ...Cathode ray type
  256     ...Electron or particle acceleration or deceleration type
  257     ...Negative resistance type
  258     WITH PARTICULAR SOURCE OF POWER OR BIAS VOLTAGE
  259     .With protective means
  260     .With A.C. or D.C. input selectively or alternately
  261     .With oscillator and/or interrupter
  262     .Fluctuating or A.C. source with rectifier and/or filter means
  263     ..With particular filter means
  264     ..With battery connected across rectifier means
  265     .With hum or interaction prevention means
  266     ..With means to supply separate out of phase voltages to plate
             and grid circuit
  267     .With voltage regulating means
  268     .Raw A.C. to plate and/or filament circuits
  269     .With thermoelectric generating means
  270     .With particular filament heating circuit means
  271     MISCELLANEOUS