Patents by Inventor William T. Risdall

William T. Risdall 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).

  • Two student arc desk
    Patent number: D501741
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: February 15, 2005
    Assignee: Smith System Manufacturing Company
    Inventor: William T. Risdall
  • Arc desk
    Patent number: D523663
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: June 27, 2006
    Assignee: Smith System Manufacturing Company
    Inventor: William T. Risdall