US PATENT SUBCLASS 331 / 73
.~ Piezoelectric crystal resonator

Current as of: June, 1999
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331 /   HD   OSCILLATORS

72  DF  ELECTRON-COUPLED TYPE {1}
73.~ Piezoelectric crystal resonator

DEFINITION

Classification: 331/73

(under subclass 72) Subject matter, wherein a piezoelectric crystal comprises a frequency determining element of the oscillator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

116, for transistor oscillators using a piezoelectric

crystal.

139, for bridge oscillator with piezoelectric crystal in the bridge network.

155, for oscillator with a crystal driven electromechanical resonator.

158+, for crystal oscillators in general.