Patents by Inventor Jonathan Wayne Wittwer

Jonathan Wayne Wittwer 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).

  • Softwall mining method and device
    Patent number: 6505892
    Abstract: A softwall mining method and device. Each of a plurality of mining devices comprise a supporting portion, an earth moving portion and a coupling mechanism for advancing the earth moving portion into a mining face, and for advancing the supporting portion toward the earth moving portion. Supporting portions of the devices are locked together to anchor movement of the earth moving portions, and earth moving portions of the devices are separately locked together to anchor the movement of the supporting portions.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: January 14, 2003
    Inventors: Joseph Chryst Walker, Randall D. Peterson, Brandon H. Woolley, Jonathan Wayne Wittwer, Joel Brian Mundt, Jesse Tate Olson, Brian Douglas Gate, Nathan L. Baker, K. S. Mortensen