US PATENT SUBCLASS 178 / 71.4
.~.~ Generator

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

70 R  DF  REPEATERS {16}
71.1  DF  .~ Automatic in either direction {14}
71.4.~.~ Generator

DEFINITION

Classification: 178/71.4

Generator:

(under subclass 71.1) Telegraph repeaters in which signal currents are amplified by a dynamo electric device.