Patents by Inventor David Hanon

David Hanon 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).

  • Telephone handset amplifier circuit
    Patent number: 4466120
    Abstract: A rocker switch is operated by the handset user to vary the impedance of a FET. The FET impedance varies in proportion to the duration of operation of the switch. The handset receiver "volume" increases or decreases in proportion to the FET impedance. An electret condensor microphone stabilizes the receiver supply voltage and provides improved transmitter linearity and low distortion.
    Type: Grant
    Filed: September 20, 1983
    Date of Patent: August 14, 1984
    Assignee: Walker Equipment Corporation
    Inventors: Wesley F. Walker, Jr., David Hanon
  • Telephone handset amplifier circuit
    Patent number: RE33309
    Abstract: A rocker switch is operated by the handset user to vary the impedance of a FET. The FET impedance varies in proportion to the duration of operation of the switch. The handset receiver "volume" increases or decreases in proportion to the FET impedance. An electret condensor microphone stabilizes the receiver supply voltage and provides improved transmitter linearity and low distortion.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: August 21, 1990
    Assignee: Walker Equipment Corporation
    Inventors: Wesley F. Walker, Jr., David Hanon