Patents by Inventor Andy Ketelaars

Andy Ketelaars 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).

  • Piston velocity detector
    Publication number: 20050231192
    Abstract: A piston velocity detector to determine the velocity of a magnet carrying piston in a cylinder, preferably in the form of a self-contained, hand-held, battery powered piston velocity detector including a plurality of magnet field sensors disposed in an array fixedly spaced from each other within the detector.
    Type: Application
    Filed: November 29, 2004
    Publication date: October 20, 2005
    Inventors: Andy Ketelaars, Heiner Ophardt