Double-layer container equipped with temperature warning device
Downed water skier warning system
Doze alarm for driver using enclosed air sound sensor
Doze alerting device
Doze prevention system
Doze-off warning apparatus for vehicle
Dozing warning device for a vehicle
Dozing warning system for a vehicle
Drain blockage responsive alarm system
Drain overflow alarm
Drain plug position indicator apparatus
Drain plug warning system
Drainage system monitoring apparatus
Drilling machine
Drinker's awareness device
Drinking container with serving counter, and methods of construc
Drip annunciator
Drip counter apparatus
Drip detecting device and drip alarming device and drip rate con
Drip rate monitor for intravenous infusion set