US PATENT SUBCLASS 178 / 66.2
.~.~ Transmitter keying

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

2 R  DF  SYSTEMS {21}
66.1  DF  .~ Alternating or pulsating current {4}
66.2.~.~ Transmitter keying

DEFINITION

Classification: 178/66.2

Transmitter keying:

(under subclass 66.1) Subject matter having a transmitter which is turned on and off or "keyed".

SEE OR SEARCH THIS CLASS, SUBCLASS:

17+, for automatic keyed transmitters.

SEE OR SEARCH CLASS

375, Pulse or Digital Communications,

309, for pulse or digital transmitter keying circuits.