Patents by Inventor William K. Messer

William K. Messer 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).

  • Placard holder
    Patent number: D285504
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: September 9, 1986
    Assignee: Gust Vagianos
    Inventor: William K. Messer