Patents by Inventor David Lawrence Emery

David Lawrence Emery has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dual polarity high voltage blocking circuit for a pulse induction metal detector
    Patent number: 10181720
    Abstract: A circuit uses a high voltage diode to automatically block high voltage flyback pulses of either polarity from the transmit coil of a pulse induction type metal detector from its sensitive receive circuitry. The circuit being fully automatic requires no control signals and permits the receive circuitry to sample the signal being received immediately following the termination of the flyback pulse.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: January 15, 2019
    Inventor: David Lawrence Emery