Patents by Inventor Charles Koistra

Charles Koistra 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).

  • Rear wheel suspension
    Patent number: 7392874
    Abstract: A rear wheel suspension system for a motorcycle has a swing arm with a pivot axis at a forward end and a wheel axis at a rear end. A wheel axle is slide mounted in a direction of travel substantially parallel to the motorcycle fork. A pair of springs mounted within the swing arm biases the wheel axle in forward neutral position and pulls the wheel axle to forward neutral position when the wheel is forced backward.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: July 1, 2008
    Inventors: Charles Koistra, Yunes A. Nabilsi
  • Rear wheel suspension
    Publication number: 20070045024
    Abstract: A rear wheel suspension system for a motorcycle has a swing arm with a pivot axis at a forward end and a wheel axis at a rear end. A wheel axle is slide mounted in a direction of travel substantially parallel to the motorcycle fork. A pair of springs mounted within the swing arm biases the wheel axle in forward neutral position and pulls the wheel axle to forward neutral position when the wheel is forced backward.
    Type: Application
    Filed: August 31, 2005
    Publication date: March 1, 2007
    Inventors: Charles Koistra, Yunes Nabilsi