Patents by Inventor Marc S. Heintz

Marc S. Heintz 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).

  • Method and apparatus for leveling manhole cover frames
    Patent number: 6371687
    Abstract: A manhole cover frame leveling clip, that attaches by a friction fit to the exterior peripheral flange of a manhole cover frame, and uses an adjustable bolt running through the clip, to manipulate the height and angle of the frame so that the frame is in the same plane or the correct elevation with the finished grade of the roadway surface.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: April 16, 2002
    Inventors: Marc S. Heintz, James L. Ableman