Patents by Inventor David E. Forristall

David E. Forristall 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).

  • Adjustable self-locking level support
    Patent number: 4095671
    Abstract: The invention relates to a self-locking level support primarily for ladders and the like, the support being adjustable to fit ladders of different widths.
    Type: Grant
    Filed: February 1, 1974
    Date of Patent: June 20, 1978
    Assignee: Utility Products, Inc.
    Inventors: David E. Forristall, Allen C. Wright