Patents by Inventor Willem Paul Kaldenbach

Willem Paul Kaldenbach 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).

  • Floating craft
    Patent number: 4100873
    Abstract: A floating vessel having a crane for lifting heavy weights comprises tanks having relatively large openings below the water-line which openings can be closed in a substantially water-tight manner to vary the shape of at least that part of the vessel which is below the water-line.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: July 18, 1978
    Assignee: Netherlands Offshore Company (Nederlandse Maatschappij voor Werken Buitengaats) B.V.
    Inventor: Willem Paul Kaldenbach