Electret transducer with variable actual air gap

Electret transducer with variable effective air gap

Electret transducer with variable electret foil thickness

Electret transducer with variably charged electret foil

Electret transducing

Electrets

Electrets

Electric actuator return-to-normal using capacitor energy storag

Electric apparatus capable of turning off a power supply...

Electric apparatus for the distribution of energy particularly f

Electric brake system and method for operating the same

Electric branch-line combiner

Electric cables

Electric car voltage conversion device with failure detection

Electric car voltage conversion device with failure detection

Electric circuit

Electric circuit arrangement for replacement of an electric swit

Electric circuit breaker for vehicle

Electric circuit control device

Electric circuit for controlling a tractor-pulled mounted device