Patents by Inventor Donald E. Whipple

Donald E. Whipple 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).

  • Sign frame and method for factory installing flexible sign facing material thereon
    Patent number: 4512098
    Abstract: In the manufacture of large signs, flexible sign facing material is fastened in stretched condition to a frame which is collapsed for shipping and erected at the job site to eliminate slack and restore its full length. Slide locking members are utilized.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: April 23, 1985
    Assignee: Lighting Systems Inc.
    Inventors: Robert J. Ready, Donald E. Whipple, James P. Sferra