US PATENT SUBCLASS 330 / 74
.~ Separate signal inputs to series devices

Current as of: June, 1999
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330 /   HD   AMPLIFIERS

70  DF  ANODE ENERGIZED THROUGH DISCHARGE PATH OF CONTROLLED VACUUM TUBE {3}
74.~ Separate signal inputs to series devices

DEFINITION

Classification: 330/74

(under subclass 70) Subject matter including at least two separate input circuits for each of two series energized vacuum tube amplifying devices.

(1) Note. A balanced (or push-pull) input circuit is treated as a single input circuit in this class and not as two separate input circuits.

SEE OR SEARCH THIS CLASS, SUBCLASS:

69, for sum and difference amplifiers.

147, for amplifiers with plural signal inputs. See the notes and search notes thereunder.