74260451
Mar 30, 1992
Apr 6, 1993
anti-theft warning apparatus; namely, sound alarms, transmitters, portable receivers with amplifiers and speakers; horns for loudspeakers, microphones; security systems comprised of microphones with recorder amplifiers and speaker functions; wireless security systems comprised of receivers, remote controllers, transmitters, temperature sensors, gas detectors, sirens, photo electronic detectors, glass break detectors
Electrical and Scientific Apparatus