Patents by Inventor Roy M Porter

Roy M Porter 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).

  • Coin display device
    Patent number: D449183
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: October 16, 2001
    Inventors: Roy M Porter, Penny Porter