CPC Subgroup
G04B 23/02 Alarm clocks
Full Title
Arrangements producing acoustic signals at preselected times > Alarm clocks
11 direct subcodes
Child Classifications
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- G04B 23/03 Alarm signal stop arrangements
- G04B 23/04 with coarse and fine setting of the preselected times
- G04B 23/06 adjustable for several preselected times with automatic stopping of the signal
- G04B 23/08 operating on successive days without resetting; operating only once in each 24 hours
- G04B 23/10 with presignal; with repeated signal; with changeable intensity of sound
- G04B 23/12 Alarm watches to be worn in pockets or on the wrist (giving signals by stimulating the skin G04B25/04)