DIFF Main Group
G04F 1/00 Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers
Introduced: September 1968
Of 3 combined children, 2 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- G04F 1/02 by consuming prefixed quantities of materials, e.g. by burning candle IPC+CPC Available in IPC and CPC