Patents by Inventor Randy S. Greenspahn

Randy S. Greenspahn 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).

  • Writing board
    Patent number: D315366
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: March 12, 1991
    Assignee: Vertiflex Company
    Inventor: Randy S. Greenspahn
  • Combined writing board and holder
    Patent number: D316727
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: May 7, 1991
    Assignee: Vertiflex Company
    Inventor: Randy S. Greenspahn