Patents by Inventor Frederick H. Harris

Frederick H. Harris 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).

  • Variable analog delay line
    Patent number: 4739290
    Abstract: A variable analog delay line apparatus utilizing a plurality of tapped SAW devices that are connected in series by single pole multi-throw switch units. The amount of delay is determined by the switch throw arm of the switch unit that is associated with the SAW device. The delay times are added serially to obtain the needed delay.
    Type: Grant
    Filed: November 5, 1986
    Date of Patent: April 19, 1988
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Ronald W. Minarik, Frederick H. Harris, Robert R. Willmore
  • Double sideband generation with serrodyne modulators
    Patent number: 4654608
    Abstract: A double sideband suppressed carrier modulator apparatus for combining two serrodyne (i.e., single sideband) modulators to achieve double sideband, suppressed carrier modulation. An RF input signal is divided into two carrier signals which are 90 degrees out of phase and applied to the serrodyne modulator units. The modulated signals from the modulators are combined in a 90 degree power divider to provide a double sideband suppressed carrier modulated output signal.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: March 31, 1987
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Ronald W. Minarik, Frederick H. Harris, John W. Gipprich