Bridge rectifier for selectively providing a full-wave or a half

Broken rail detecting track circuits

Bulk degausser

Bulk degausser with fixed arrays of magnet poles

Bulk erase tool for erasing perpendicularly recorded media

Bulk tape eraser

Bulk tape eraser with rotating magnetic field

Burglarproofing device for automotive vehicles

Capacitive discharge drive for electric stapler

Capacitive sensing scheme for digital control state...

Capacitor based bi-directional degaussing device with chamber

Card key switch

Central locking system

Central locking system for lockable entries of buildings or vehi

Charge control circuit

Charge control of micro-electromechanical device

Chatterless low power AC solenoid without pole shading

Chopped light relay keyer

Chopper circuit for driving electromagnet and/or step motor coil

Chopper drive control circuit