US PATENT SUBCLASS 368 / 152
.~.~.~ Gravity

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

139  DF  MECHANICAL TIME BASE {1}
140  DF  .~ Mainspring {7}
147  DF  .~.~ With winding {3}
152.~.~.~ Gravity

DEFINITION

Classification: 368/152

Gravity:

(under subclass 147) Subject matter including a falling weight for providing energy.