Patents by Inventor Kurt Spiegemacher

Kurt Spiegemacher 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).

  • Chopper knife
    Patent number: 5941469
    Abstract: A forage harvester chopper knife includes a cutting region defined by a plurality of recesses arranged across the width of the knife so as to result in a corrugated or serrated cutting edge, the cutting edge thus defined requiring less energy for cutting crop passing over a cutter bar.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: August 24, 1999
    Assignee: Deere & Company
    Inventor: Kurt Spiegemacher