Patents by Inventor Craig A. Spielman

Craig A. Spielman 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).

  • Agricultural tubing extractor and related methods
    Patent number: 9528634
    Abstract: An extractor for removing agricultural tubing from soil of a field and related methods are provided. The extractor includes a frame and a pivot frame disposed on the frame. The pivot frame can have a pivot axis around which at least a portion of the pivot frame is pivotal. The extractor can include a first roller secured to the frame and a second roller secured to the pivot frame that is moveable by the pivot frame with the first roller being positioned closer to the soil than the second roller so that a tubing to be extracted is threadable under the first roller and over the second roller.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: December 27, 2016
    Assignee: Syngenta Participations AG
    Inventors: Lawrence A. Ephan, Jr., Craig A. Spielman, Daniel E. Larson, Kevin W. Meier