IPC Definitions - January 01, 2012
H04W 4/22 - Definition
This group covers:
Summoning response to an urgent or hazardous situation.
Attention is drawn to the following places, which may be of interest for search:
Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems, using wireless transmission systems | G08B 25/10 |