Patents by Inventor Donald H. Shaktman

Donald H. Shaktman 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).

  • Dual crowned hemorrhoid support seat cushion
    Patent number: 4709431
    Abstract: A hemorrhoid relief cushion is constructed with aligned, elongated, convexly elevated portions of different size to reduce inventory requirements by half and also reduce the number of fabrication molds needed for making a complete inventory of cushion sizes in half.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: December 1, 1987
    Inventor: Donald H. Shaktman