Patents by Inventor John M. Tipper

John M. Tipper 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).

  • Plow cutter assembly
    Patent number: 4065184
    Abstract: A plow cutter assembly to be used in the strip mining of coal, the assembly comprising a container having a plurality of steel spikes mounted at an angle on its lower face. A hoist pulls the assembly along the face of a coal vein and the spikes shave off layers of coal.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: December 27, 1977
    Inventor: John M. Tipper