Brake fluid reservoir including fluid level indicator
BREATH TESTING SYSTEM
Brush wear indicator
Bulb outage warning system
Burglar alarm
Burglar alarm system
Burglar and fire alarm system
Burglar warning device
Calorimetric flow monitor
Cargo monitor apparatus and method
Cash register security system
Catalytic detecting apparatus for detecting combustible gases an
Centralized monitor and alarm system for monitoring remote areas
Centralized monitoring system for gas leakage
Charge monitor for electric battery
Child care communication and surveillance system
Christmas tree fire detector and alarm
Circuit arrangement for automatic level control for optical sens
Circuit arrangement for monitoring interruptions in two closed-c
Circuit energization indicator with thermal timing means to main