Patents by Inventor Christopher J. Wanner

Christopher J. Wanner 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: 7198112
    Abstract: An improved minesweeper having a two-sided frame adapted to be coupled to and pushed by a tractor and a rake pivoted from each side of the frame by respective pairs of coupling bars of different lengths so that as the rake moves away from the frame to bury itself in the soil, the coupling bars rotate it to a less aggressive digging angle that prevents the rake from stalling the tractor, wherein the improvement comprises apparatus connected to the frame for catching and sifting mines, soil, rocks and other objects buried in the soil passing over the rake without small amounts of vegetation and variances in soil conditions clogging the catching and sifting means.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: April 3, 2007
    Assignee: United States of America as Represented by the Department of the Army
    Inventor: Christopher J Wanner
  • Patent number: 6330920
    Abstract: A mine stripper with numerous plow blades that rotate as they dig deeper to achieve an equilibrium depth of about nine inches and a basket that presses against the top of these blades to receive dislodged mines while sifting away attached soil.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: December 18, 2001
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Christopher J. Wanner