CPC Subclass Not Allocatable
G04R RADIO-CONTROLLED TIME-PIECES
Description
G04R covers timepieces that receive time signals via radio transmission to synchronize or set their displayed time. This includes atomic clocks, radio clocks, and watches that automatically adjust to standard time broadcasts from designated transmitters. The classification encompasses both the reception apparatus and synchronization mechanisms integrated into timekeeping devices, but excludes general radio receiver technology classified elsewhere and purely mechanical timepieces without radio reception capability.
3 direct subcodes
Child Classifications
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- G04R 20/00 Setting the time according to the time information carried or implied by the radio signal
- G04R 40/00 Correcting the clock frequency
- G04R 60/00 Constructional details