US PATENT SUBCLASS 451 / 418
.~ To electrical machine to abrade commutator

Current as of: June, 1999
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451 /   HD   ABRADING

415  DF  ATTACHMENT {13}
418.~ To electrical machine to abrade commutator

DEFINITION

Classification: 451/418

To electrical machine to abrade commutator:

(under subclass 415) Attachment adapted to be secured to an electric motor or generator and to abrade the commutator thereof.