ATSUMI

INFRARED SENSORS; ELECTRIC SWITCHES; RADIO RECEIVERS; ELECTRIC BELLS; SIRENS AND BUZZERS; DC POWER SOURCE UNITS; ELECTRONIC SECURITY SYSTEMS COMPRISING KEY SWITCHES, CARD SWITCHES AND NOISE MAKING UNITS IN THE NATURE OF BELLS, BUZZERS AND SIRENS; CENTRAL STATION CONTROL UNITS; BURGLAR ALARMS; FIRE ALARM BOXES; ELECTRONIC RAILROAD SIGNALLING AND SWITCHING UNITS