Patents by Inventor Robert Heinsius

Robert Heinsius 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: 4785544
    Abstract: A spirit level accessory for an electric drill is provided and consists of a clamp member to fit on mounting surface of the electric drill, a dial member mounted on the clamp member and adjustable to obtain correct position with respect to center line of the electric drill, a bracket member held at any desired angle to the dial member by a spring force, a spirit level member held by the bracket member and a cover member having a mirrored inside surface and hinged on the spirit level member to protect the spirit level member against damage when not in use, allowing the spirit level member to be viewed when fully opened and viewed from the mirrored inside surface when halfway opened.
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: November 22, 1988
    Inventors: Robert Heinsius, George Spector