US Patent Class 290
PRIME-MOVER DYNAMO PLANTS-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
1 R  DF  MISCELLANEOUS {5}
2  DF  HEATING PLANTS
3  DF  TRAIN
4 R  DF  PLURAL PRIME MOVER {4}
5  DF  ALTERNATING CURRENT, ROTARY FIELD AND ARMATURE
6  DF  MULTIPLE-ARMATURE DYNAMO
7  DF  ELECTRIC CONTROL {10}
45  DF  TRACTION
46  DF  STARTING AND GENERATING DYNAMO
47  DF  ELECTRIC-STARTING MOTOR WITH GENERATOR
48  DF  ELECTRIC-STARTING MOTOR
49  DF  ROTARY FIELD AND ARMATURE
50  DF  BATTERY
51  DF  ENGINE CONTROL
52  DF  TURBOGENERATORS
53  DF  TIDE AND WAVE MOTORS
54  DF  FLUID-CURRENT MOTORS {1}