Patents by Inventor Shirley E. Wapner

Shirley E. Wapner 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).

  • Stair lift
    Patent number: 4915573
    Abstract: A stair lift incorporates a pair of power jacks linked to a stair or step and associated with a vehicle such as a trailer adjacent the vehicle doorway, with the jacks operating in tandem to raise or lower the stair or step with a person standing thereon.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: April 10, 1990
    Inventors: Frank J. Wapner, Shirley E. Wapner