DIFF Subgroup
G08B 29/12 Checking intermittently signalling or alarm systems
Introduced: January 1990
Full Title
Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation > Checking intermittently signalling or alarm systems
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
IPC defines codes here since 1990.
Child Classifications
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