Patents by Inventor Edward M. Williamson

Edward M. Williamson 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).

  • Technical pen adapter
    Patent number: D288336
    Type: Grant
    Filed: June 27, 1984
    Date of Patent: February 17, 1987
    Inventors: J. Frank Carroll, Edward M. Williamson