(under subclass 76) Subject matter having means for utilizing electrostatic attraction or repulsion or piezo-electric action in order to respond to the electricity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
78+, and 83+, for this subject matter when utilized to measure frequency or compare phase as, for example, in synchroscopes.
SEE OR SEARCH CLASS
310, Electrical Generator or Motor Structure,
309, for electrostatic motors and subclasses 311+ for piezo-electric devices and systems, per se.
361, Electricity: Electrical Systems and Devices, 271+, for electrostatic condensers, per se.
