Patents by Inventor William C. Marshburn

William C. Marshburn 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).

  • Mattress
    Patent number: D356917
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: April 4, 1995
    Assignee: Bemco Associates, Incorporated
    Inventor: William C. Marshburn
  • Top and bottom surface unit of a mattress
    Patent number: D356918
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: April 4, 1995
    Assignee: Bemco Associates, Incorporated
    Inventor: William C. Marshburn