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PCE
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DIFF Subgroup
G04B 23/02

Alarm clocks

Introduced: September 1968

Full Title

Arrangements producing acoustic signals at preselected times > Alarm clocks

Of 11 combined children, 6 exist in both systems.

5 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • G04B 23/021 CPC only CPC only
  • G04B 23/023 CPC only CPC only
  • G04B 23/025 CPC only CPC only
  • G04B 23/026 CPC only CPC only
  • G04B 23/028 CPC only CPC only
  • G04B 23/03 Alarm signal stop arrangements since 1980 IPC+CPC Available in IPC and CPC
  • G04B 23/04 with coarse and fine setting of the preselected times IPC+CPC Available in IPC and CPC
  • G04B 23/06 adjustable for several preselected times with automatic stopping of the signal IPC+CPC Available in IPC and CPC
  • G04B 23/08 operating on successive days without resetting; operating only once in each 24 hours IPC+CPC Available in IPC and CPC
  • G04B 23/10 with presignal; with repeated signal; with changeable intensity of sound IPC+CPC Available in IPC and CPC
  • G04B 23/12 Alarm watches to be worn in pockets or on the wrist (giving signals by stimulating the skin G04B25/04) IPC+CPC Available in IPC and CPC