Patents by Inventor Harold A. Grainger

Harold A. Grainger 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).

  • Portable automobile straightening device
    Patent number: 4238951
    Abstract: An apparatus and method for straightening damaged unibody-type vehicles whereby a lightweight rectangular frame is attached at its four corners to the longitudinal pinch weld which runs along both sides of the vehicle body. The frame members are rigidly connected to each other but telescopingly adjustable in length to accommodate different size vehicles and have pulling attachment points at the corners of the frame allowing pulling or pushing in any direction.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: December 16, 1980
    Assignee: Grainger Bros., Inc.
    Inventors: James D. Grainger, Harold A. Grainger