(under subclass 314) Subject matter having an electric circuit element which receives the electric output from the piezoelectric element.
(1) Note. This subclass is generally restricted to devices that have a mechanical input to the piezoelectric device. However, an exception is where an electric input to a piezoelectric device is acknowledged as prior art or merely nominally disclosed (e.g., as by schematically representing an A.C. or D.C. source as the input), or where the piezoelectric device functions as both an electromechanical transducer and a mechanical to electrical transducer and the electric input circuit is acknowledged as prior art or merely nominally disclosed (the output circuit may be to "protect" the input circuit from the voltage produced by the mechanical-electrical function).
