73826181
Sep 18, 1989
Apr 10, 1990
SECURITY ALARM SYSTEMS - NAMELY, PHONE PROGRAMMABLE HARD WIRED OR WIRELESS CENTRAL PROCESSING UNITS AND ASSOCIATED RADIO RECEIVERS, HARD WIRE MODULES, DIGITED COMMUNICATORS, ANNUCIATOR DRIVERS, ENERGY CONSERVATION MODULES AND UTILITY METER READING MODULES
Electrical and Scientific Apparatus