(under subclass 159) Subject matter having a commutator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
127+, for this subject matter having plural commutators.
167, for this subject matter in an induction motor.
SEE OR SEARCH CLASS
318, Electricity: Motive Power Systems, 725+, for repulsion motor systems and subclasses 244+ for other alternating current motor systems in which the motor has a commutator.