Patents by Inventor Harold S. Swartz

Harold S. Swartz 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).

  • Special purpose ladder
    Patent number: 4722420
    Abstract: This ladder is designed to clamp to sign posts for workman safety. Primarily, it consists of a pair of stepped legs with a hinged shelf at the top having a clamp that clamps to a sign post. A second clamp is also provided below and is secured to arms attached to the legs, and a pair of extension rods are provided on the legs for stabilily of the legs on sloping ground surfaces.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: February 2, 1988
    Inventors: Trudy Arthurs, Harold S. Swartz