US PATENT SUBCLASS 379 / 342
.~.~ Electronic (e.g., logic circuitry)

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

338  DF  REPEATER (E.G., VOICE FREQUENCY) {9}
341  DF  .~ Pulse or tone repeater (e.g., electromechanical relay) {1}
342.~.~ Electronic (e.g., logic circuitry)

DEFINITION

Classification: 379/342

Electronic (e.g., logic circuitry):

(under subclass 341) Subject matter having a signal processing component utilizing an electron discharge device or semi-conductor component.