Patents by Inventor Wolfgang Kraker von Schwarzenfeld

Wolfgang Kraker von Schwarzenfeld 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).

  • Sail which can be rolled-up or reefed
    Patent number: 5787831
    Abstract: A reefed sail including an inflatable luff chamber which forms an integral part of the sail and defines a reefing axis.
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: August 4, 1998
    Inventor: Wolfgang Kraker von Schwarzenfeld