Patents by Inventor Russell D. Garrod

Russell D. Garrod 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).

  • Soil treatment apparatus and method
    Patent number: 5143305
    Abstract: A method and apparatus for removing from soil particles within a predetermined size range, comprises a movable frame, and a digger attached thereto to excavate soil as the frame is moved. A first separater to which the excavated soil passes allows material of less than a first predetermined size to pass through and discards material of size greater than said first predetermined size. A second separater is adapted to retain material of size greater than a minimum of said predetermined size range and to discard material of size less than said minimum. The retained material is stored.
    Type: Grant
    Filed: June 13, 1991
    Date of Patent: September 1, 1992
    Assignee: L.R.S. Limited
    Inventors: Paul V. Dunham, Russell D. Garrod