Patents
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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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G04B 33 - Calibers
Patents for G04B 33 - Calibers (302)
03/1976
03/23/1976
US3945197
Timepiece
03/16/1976
US3943695
Quartz crystal controlled timekeeping apparatus
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