IPC Subgroup
H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems
Introduced: September 1968
Last revised: January 2006
Full Title
Telephonic communication systems specially adapted for combination with other electrical systems > with alarm systems, e.g. fire, police or burglar alarm systems
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TELEPHONIC COMMUNICATION