US PATENT SUBCLASS 310 / 137
.~.~.~.~ Double current D. C. machines

Current as of: June, 1999
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310 /   HD   ELECTRICAL GENERATOR OR MOTOR STRUCTURE

10  DF  DYNAMOELECTRIC {5}
40 R  DF  .~ Rotary {28}
127  DF  .~.~ Plural collector-type machines {4}
136  DF  .~.~.~ Plural commutator type {3}
137.~.~.~.~ Double current D. C. machines {2}
138  DF  .~.~.~.~.~> Dynamotor type
139  DF  .~.~.~.~.~> Hetero-axial excitation

DEFINITION

Classification: 310/137

(under subclass 136) Subject matter adapted to be used as double current direct current machines.