US Patent Class 388
ELECTRICITY: MOTOR CONTROL SYSTEMS-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
800  DF  CLOSED LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {4}
825  DF  OPEN LOOP SPEED CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {3}
842  DF  CLOSED LOOP ACCELERATION CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {2}
848  DF  OPEN LOOP ACCELERATION CONTROL SYSTEM FOR DC MOTOR WITH COMMUTATOR {2}
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CROSS-REFERENCE ART COLLECTIONS
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900  DF  SPECIFIC SYSTEM OPERATIONAL FEATURE {6}
907  DF  SPECIFIC CONTROL CIRCUIT ELEMENT OR DEVICE {13}
923  DF  SPECIFIC FEEDBACK CONDITION OR DEVICE {6}
935  DF  SPECIFIC APPLICATION: {2}