Patents by Inventor Jack Edward Arfstrom

Jack Edward Arfstrom 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).

  • Control for hydrostatic transmissions
    Patent number: 5848520
    Abstract: A vehicle having a hydrostatic transmission is provided with a main speed control lever for governing the vehicle's maximum forward speed and an independently adjustable tracking control mechanism for coordinating output of left and right hydraulic wheel motors.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: December 15, 1998
    Assignee: Deere & Company
    Inventors: Jack Edward Arfstrom, Stephen Alphonse Braun, Llewellyn Everett Williams
  • Blade
    Patent number: D487098
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: February 24, 2004
    Assignee: Deere & Co.
    Inventors: Jack Edward Arfstrom, John William Hopkins, David James Pahl