Patents by Inventor Dewey D. Blocksma

Dewey D. Blocksma 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).

  • Improved chair with convex upper backrest and forward seat surfaces
    Patent number: 4783121
    Abstract: An improved chair (10) having convex back rest portions (11a) and a convex seat front portion (13) is described. The seat is designed to externally rotate the hip joints (P.sub.7 and P.sub.8) of a seated person P towards the floor or other support surface. The convex back rest portions and seat rest portions preferably include flexible segments (A and E) for increased support. The chair provides greater comfort and body support.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: November 8, 1988
    Inventors: Harley E. Luyk, Dewey D. Blocksma