S SENGATE

ELECTRONIC SECURITY SYSTEMS FOR INTRUSION DETECTION, ALARM MONITORING SURVEILLANCE AND REMOTE CONTROL, COMPRISED OF DETECTORS, NAMELY, INFRARED DETECTORS, LASER INTRUSION DETECTORS, TIMING SENSORS, VIDEO DISPLAY MONITORS, GRAPHIC DISPLAY PANELS, ANTI-INTRUSION ALARMS, BURGLAR ALARMS, FIRE ALARMS, GAS DETECTION ALARMS, EMERGENCY WARNING LIGHTS, MAGNETIC ENCODED CARD READERS, BLANK MAGNETIC CARDS FOR USE WITH MAGNETIC ENCODED CARD READERS, SIGNAL PROCESSORS, ELECTRIC SWITCHES, REMOTE ELECTRIC CONTROLLERS, AND TELEPHONE APPARATUS, NAMELY, INTERCOMS