US PATENT SUBCLASS 368 / 159
.~.~.~ Crystal

Current as of: June, 1999
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368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

155  DF  ELECTRICAL TIME BASE {2}
156  DF  .~ Solid state oscillating circuit type {1}
157  DF  .~.~ For reciprocating or oscillating element {2}
159.~.~.~ Crystal

DEFINITION

Classification: 368/159

Crystal:

(under subclass 157) Subject matter wherein the element is a crystal.

SEE OR SEARCH CLASS

331, Oscillators,

116+, for solid state oscillators controlling electromechanical resonators.