Patent Classification Explorer PCE

DIFF Subgroup

G04G 13/02

at preselected times, e.g. alarm clocks

Introduced: January 1980

Full Title

Producing acoustic time signals > at preselected times, e.g. alarm clocks

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

Child Classifications

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G04G 13/021 +1 CPC CPC only CPC only
G04G 13/025 CPC only CPC only
G04G 13/026 CPC only CPC only
G04G 13/028 CPC only CPC only