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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11/00
Click devices; Stop clicks; Clutches
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G04B11/001
Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power
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G04B11/003
with friction member, e.g. with spring action
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