(under subclass 635) Subject matter where the device is an active electronic circuit or component; e.g., amplifier, vacuum tube, or transistor.
(1) Note. Significant art structure with indicating device will classify claimed subject matter with art structure as pointed out in (2) Note of the general class definitions of this class (340).
SEE OR SEARCH THIS CLASS, SUBCLASS:
654, for monitoring of energization of a component.
SEE OR SEARCH CLASS
330, Amplifiers,
2, for amplifiers with indicating means. 331, Oscillators,
64, for oscillators with alarms.
377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,
112+, for electrically operated registers with indicators.
