Patents by Inventor John Leszcak

John Leszcak 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).

  • Telephone list finder
    Patent number: D319471
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: August 27, 1991
    Assignee: Bates Manufacturing Company
    Inventors: John Leszcak, C. E. Williams