US PATENT SUBCLASS 368 / 139
MECHANICAL TIME BASE

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

139MECHANICAL TIME BASE {1}
140  DF  .~> Mainspring {7}

DEFINITION

Classification: 368/139

MECHANICAL TIME BASE:

(under the class definition) Subject matter including mechanically-powered means for providing impulses to the beat measuring time indicator control portion of a timepiece.

SEE OR SEARCH THIS CLASS, SUBCLASS:

155, for timepiece electrical timepieces.

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185, Motors: Spring, Weight, or Animal Powered,

27+, and 37+ for weight and spring-powered motors.