Patents by Inventor Harlan S. Martin

Harlan S. Martin 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: 5221156
    Abstract: A power unit base supports a power unit which has a power drive extending through a circular spacing member plate mounted above a concrete finishing plate on which are attached concrete finishing members. Spaced handles extend above the finishing plate and provide hand gripping surfaces whereby the unit can be operated while the operator stands above the machine. The engine power shaft extends through bearings and is attached to the finishing plate. Control means for the power unit is mounted on one of the handles.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: June 22, 1993
    Inventor: Harlan S. Martin