Patents by Inventor Billy O. Cooke

Billy O. Cooke 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).

  • Local oscillator frequency drift compensation circuit
    Patent number: 4340974
    Abstract: The invention provides a double superheterodyne receiver having the usual first and second frequency changers associated with first and second local oscillators. The second local oscillator is provided as a voltage controlled oscillator and means are provided for determining the difference frequency between the two local oscillators to produce a control signal which is applied to the second local oscillator to tend to maintain the difference frequency constant.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: July 20, 1982
    Assignee: Eddystone Radio Limited
    Inventors: Billy O. Cooke, Philip N. Nield