Patents by Inventor John D. Riski

John D. Riski 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 crust loosening apparatus
    Patent number: 4768596
    Abstract: An apparatus for loosening a crust formed in the soil over planted seeds. A drum having a plurality of fingers rotatably disposed around an outer cylindrical surface thereof is biased toward the ground by spring rods which are adjustably attached to a frame. The frame is typically mounted to a prime mover such as a tractor or to a cultivator or the like attached to an agricultural tractor.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: September 6, 1988
    Assignee: Harriston Industries, Inc.
    Inventor: John D. Riski