Patent classifications
G
PHYSICS
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G04
HOROLOGY
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G04B
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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G04B5/02
by self-winding caused by the movement of the watch
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G04B5/04
by oscillating weights the movement of which is limited
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G04B5/08
acting in both directions
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