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: 290
 Class Title: PRIME-MOVER DYNAMO PLANTS

Subclass  Subclass
Number    Title

  1 R     MISCELLANEOUS
  1 A     .Unitary plant
  1 B     .Air-cooled generator
  1 C     .Drive gearing
  1 D     .Chain drive
  1 E     .Spring motor
  2       HEATING PLANTS
  3       TRAIN
  4 R     PLURAL PRIME MOVER
  4 A     .Tie with another generator
  4 B     .Induction generator
  4 C     .Plural with combined drive
  4 D     .Plural prime movers with fluid interconnection
  5       ALTERNATING CURRENT, ROTARY FIELD AND ARMATURE
  6       MULTIPLE-ARMATURE DYNAMO
  7       ELECTRIC CONTROL
  8       .Excitation dynamo
         .Traction
  9       ..Electric traction motor
  10      ...With starting and generating dynamo
  11      ....With generator
  12      ....Rotary field and armature
  13      ....Ignition
  14      ...With generator
  15      ....Rotary field and armature
  16      ....Battery
  17      ....Engine control
  18      ...As starter
  19      ....As generator
  20      .....Rotary field and armature
  21      ....Engine control
  22      ..Starting and generating dynamo
  23      ...Rotary field and armature
  24      ....Engine control
  25      ...Engine control
  26      ....Ignition
  27      ..Electric-starting motor with generator
  28      ..Electric-starting motor
  29      ..Rotary field and armature
  30 R    .Demand starters
  30 A    ..Standby source
  30 B    ..Standby service
  31      .Starting and generating dynamo
  32      ..With generator
  33      ...Ignition
  34      ..Engine control
  35      ...Ignition
  36 R    .Electric-starting motor with generator
  37 R    ..Ignition
  37 A    ...Stop cranking responsive to generator output
  36 A    ..Automatic starters including centrifugally operated
             contactorss
  38 R    .Electric-starting motor
  38 A    ..Axially movable armatures
  38 B    ..Inertia starters
  38 C    ..Miscellaneous collection of automatic engine starters
  38 D    ..Stop cranking responsive to manifold conditions
  38 E    ..Automatic starter including pedal control
  39      .Rotary field and armature
  40 R    .Engine control
  41      ..Ignition
  40 A    ..Control in response to engine speed
  40 B    ..Control in response to generator line conditions
  40 C    ..Control in response to generator and prime mover
             conditions
  40 D    ..Control in response to a time standard
  40 E    ..Circuit resonant at given frequency
  40 F    ..Control in response to D. C. generator output
  42      .Tide and wave motors
  43      .Fluid-current motors
  44      ..Wind
  45      TRACTION
  46      STARTING AND GENERATING DYNAMO
  47      ELECTRIC-STARTING MOTOR WITH GENERATOR
  48      ELECTRIC-STARTING MOTOR
  49      ROTARY FIELD AND ARMATURE
  50      BATTERY
  51      ENGINE CONTROL
  52      TURBOGENERATORS
  53      TIDE AND WAVE MOTORS
  54      FLUID-CURRENT MOTORS
  55      .Wind