Patents by Inventor Richard Karl Koch

Richard Karl Koch 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).

  • Compact multipurpose trailer tug
    Patent number: 6758291
    Abstract: A light portable tug including reversible wheels, a direct current motor device for driving the wheels and a drive train between such motor and wheels and including a control device for selectively rotating such wheels for controlling the direction of such Tug.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: July 6, 2004
    Inventor: Richard Karl Koch