CPC Subgroup
G04B 17/20 Compensation of mechanisms for stabilising frequency
Full Title
Mechanisms for stabilising frequency > Compensation of mechanisms for stabilising frequency
4 direct subcodes
Child Classifications
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- G04B 17/22 for the effect of variations of temperature
- G04B 17/24 for the effect of variations of atmospheric pressure
- G04B 17/26 for the effect of variations of the impulses
- G04B 17/28 for the effect of imbalance of the weights, e.g. tourbillon