Patents by Inventor William Terry Doan

William Terry Doan 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).

  • Hand held quiz computer and educational device
    Patent number: 6065972
    Abstract: A hand held quiz computer and educational device which includes an optical scanner in conjunction with a microprocessor, which scans a portion of preprinted quiz or educational cards that present questions or information, with the correct answers to the questions or verification information on the bottom, which is inputted to the microprocessor and compared with the user's responses.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: May 23, 2000
    Inventor: William Terry Doan