CPC Subgroup
G04C 3/04 wherein movement is regulated by a balance
Full Title
Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means (clocks driven by synchronous motors G04C15/00) > wherein movement is regulated by a balance
3 direct subcodes
Child Classifications
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- G04C 3/06 using electromagnetic coupling between electric power source and balance