Patents by Inventor Richard R. Sheffield

Richard R. Sheffield 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).

  • Patent number: 4974525
    Abstract: A table apparatus including a plurality of plural leg pairs mounted in a scissor-like relationship relative to each other, including an elongate, tubular polymeric member mounted to an upper horizontal support member associated with each leg pair. A tether line is mounted to secure opposing legs of associated leg pairs relative to one another. A modification of the table apparatus includes each leg of each leg pair formed with a bifurcated upper end adjustably mounting a "U" shaped member thereto to permit height adjustment of the table apparatus.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: December 4, 1990
    Inventor: Richard R. Sheffield