Patents by Inventor William Frank Kruszewski

William Frank Kruszewski 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).

  • Wide band automatic frequency control circuit
    Patent number: 3944725
    Abstract: An automatic frequency control (AFC) circuit for a signal receiver having a tuner, intermediate frequency (IF) amplifier, video amplifier, and sync pulse separation means includes a discriminator coupled to the IF stage and a signal combining means coupled to the discriminator means and sync pulse separation means and to the tuner to effect a given "pull-in" range for the tuner in response to error signals from the discriminator and an increased "pull-in" range upon loss of sync signals from the sync pulse separation means when the tuner stage is increasingly detuned.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: March 16, 1976
    Assignee: GTE Sylvania Incorporated
    Inventors: Rangaswamy Arumugham, William Frank Kruszewski, Karol Siwko