HOME SECURITY SYSTEMS AND INTRUSION ALARMS COMPOSED OF SENSORS AND CONTROLLERS; REMOTE CONTROL SYSTEMS COMPOSED OF A TRANSMITTER, RECEIVER AND CONTROLLER FOR CONTROLLING THE OPERATION OF ELECTRICAL APPLIANCES AND LIGHTS; AND APPLIANCE CONTROLLERS, LAMP AND APPLIANCE CONTROL MODULES, WALL SWITCH AND DIMMER MODULES, AND REMOTE-CONTROL TRANSMITTERS AND RECEIVERS
Electrical and Scientific Apparatus