Patents by Inventor John R. Van Plantinga

John R. Van Plantinga 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).

  • Cargo handling system for a marine cargo vessel
    Patent number: 4309953
    Abstract: A cargo handling system for a marine cargo vessel. The system includes a hold unit wherein is floatably disposed a cargo capsule. The cargo capsule has an upper cargo deck, a lower cargo deck, and a floatation-ballast chamber. Water is moved into and out of the hold unit to vertically position the cargo capsule for selectively loading or unloading the cargo decks.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: January 12, 1982
    Inventor: John R. Van Plantinga