Patents by Inventor John G. Schwengel

John G. Schwengel 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).

  • Lumber levering tool
    Patent number: D351326
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: October 11, 1994
    Assignee: Hart Tool Company, Inc.
    Inventor: John G. Schwengel