Patents by Inventor Thomas C. Shaffer

Thomas C. Shaffer 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).

  • Log raiser
    Patent number: 4433829
    Abstract: A log raiser for gripping a log and supporting it above ground for easy cutting. A toothed claw locks the log against a pair of rods with ridges and a lever arm extending outwardly from the rods is moved from an upright position into contact with the ground to rotate the gripped log so that it is supported above ground by means of a pair of trusses which are attached to the rods.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: February 28, 1984
    Inventors: Mark D. Grover, Thomas C. Shaffer