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PCE
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DIFF Subgroup
G08C 19/12

in which the signal transmitted is frequency or phase of AC

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Electric signal transmission systems > in which the signal transmitted is frequency or phase of AC

CPC:

Electric signal transmission systems (G08C17/00 takes precedence) > in which the signal transmitted is frequency or phase of AC

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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  • G08C 19/14 using combination of fixed frequencies IPC+CPC Available in IPC and CPC