Miniature buzzer
Miniature sounder with multi-part tuned cavities
Modular panel of tungsten light switches with current limiting i
Mosquito dispersing device
Mosquito guard
Motorcycle sound simulator for a child's toy
Motorcycle sound simulator for non-motorized vehicle
Multi-color traffic signal
Multi-mode doll
Multifrequency piezoelectric horn system
Multiple mode sound generator
Multiple tone signaling device
Multitone signaling device
Musical chime device
Noise generator circuit for a security system
Optical fiber display device
Optical fibers
Ozone/supersonic wave insect expelling device
Pest animal repulsing apparatus
Piezo electronic horn