Patents by Inventor David L. Hadbavny

David L. Hadbavny 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: 5201488
    Abstract: A telescoping tubular body consisting of two tubular sections which are secured to each other by a simple spring and pin assembly to attain adjustable lengths between two opposing objects. Feet are located at each end of the tubular body to properly distribute pressure to a surface without disturbing same. These feet are interchangeable with other tools to make this invention flexible for a multitude of purposes.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: April 13, 1993
    Inventor: David L. Hadbavny
  • Patent number: 4695037
    Abstract: A lifting apparatus is disclosed for lifting steel grates and the like. The apparatus includes a fulcrum member including an outer U-shaped support member and an inner U-shaped rim holding and support member. A lever is provided. A bolt passes through outer and inner U-shaped rim holding and support members and the lever. The apparatus is easy to use and folds for storage.
    Type: Grant
    Filed: March 6, 1987
    Date of Patent: September 22, 1987
    Inventor: David L. Hadbavny