Patents by Inventor Richard A. Kolbusz

Richard A. Kolbusz 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).

  • Lock for trailer hitch
    Patent number: 5000067
    Abstract: For a two-piece trailer hitch, a secure locking device is formed with a U-shaped member and a compatible bar for the U-shaped member. The U-shaped member has a female threaded end and female locking end. The bar has a male threaded end and a female key receiving end. A holding pin may provide additional strength for holding the bar in the U-shaped member. A key removes the bar from or attaches the bar to the U-shaped member.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: March 19, 1991
    Inventors: Richard A. Kolbusz, Jon F. Huizinga