73688793
Oct 9, 1987
Jun 14, 1988
ELECTRONIC SECURITY APPARATUS COMPRISING BURGLAR ALARMS, FIRE ALARMS, TEMPERATURE CONTROLS, ACCESS CONTROL UNITS INCLUDING THOSE ACTIVATED BY ENCODED CARDS, CLOSED CIRCUIT TELEVISION CAMERAS, RECORDERS AND MONITORS, ALARMS SYSTEM MONITORING UNITS AND TEMPERATURE CONTROL MONITORING UNITS
Electrical and Scientific Apparatus