DIFF Subgroup
H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems
Introduced: September 1968
Full Title
Telephonic communication systems specially adapted for combination with other electrical systems > with alarm systems, e.g. fire, police or burglar alarm systems
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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