Patents by Inventor R. David Gronlund

R. David Gronlund 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: 4934174
    Abstract: A sheet metal bending tool is disclosed uniquely adapted for bending and repairing automotive sheet metal parts. The tool includes at least a shank and a hook end portion designed to facilitate holding and bending of sheet metal edges in a variety of applications. In a preferred embodiment, the tool also includes a "V" shaped inner surface specially adapted to grip metal pieces. Alternate constructions of the tool may include a useful ring-end portion or a second hook end portion to increase the range of applications for the tool.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: June 19, 1990
    Inventors: R. David Gronlund, Dawn Gronlund