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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17/00
Mechanisms for stabilising frequency
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G04B17/04
Oscillators acting by spring tension
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G04B17/06
Oscillators with hairsprings, e.g. balance
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G04B17/063
Balance construction
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