Patents by Inventor William J. Chermak

William J. Chermak 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 capacitor
    Patent number: D246453
    Type: Grant
    Filed: March 15, 1977
    Date of Patent: November 22, 1977
    Assignee: E. F. Johnson Company
    Inventors: William J. Chermak, F. Joseph Kozan, Chander M. Wahi