Patents by Inventor Don C. Merkel

Don C. Merkel 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).

  • Controllable gangplank for pontoon boat
    Patent number: 4993341
    Abstract: A gangplank for forward fixture on a pontoon barge consisting of a retaining slide structure secured longitudinally beneath the barge deck with a gangplank slidably carried therein, and an electric cable drive system controllable to move the gangplank reciprocally forward from beneath the barge.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: February 19, 1991
    Inventor: Don C. Merkel