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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup
G04C 3/12

driven by piezoelectric means; driven by magneto-strictive means

Introduced: January 1980

Title

Titles differ between systems:

IPC: driven by piezoelectric means; driven by magnetostrictive means

CPC: driven by piezoelectric means; driven by magneto-strictive means

Full Title

Full titles differ between systems:

IPC:

Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means > wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork > driven by piezoelectric means; driven by magnetostrictive means

CPC:

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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork > driven by piezoelectric means; driven by magneto-strictive means

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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