Patents by Inventor Gary Wayne Holmlund

Gary Wayne Holmlund 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).

  • Marker circuit
    Patent number: 4028587
    Abstract: A circuit is provided for use with a swept frequency test system to produce a marker on the system display when the swept frequency signal reaches one or more predetermined reference frequencies. The marker circuit mixes the swept frequency signal with a reference frequency signal to produce a beat frequency signal or birdie, and a frequency detecting circuit detects when the frequency of the birdie is below a predetermined frequency. When this occurs a marker pulse is generated for use in the system display.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: June 7, 1977
    Assignee: Hewlett-Packard Company
    Inventors: Gary Wayne Holmlund, Toshio Ichino