Patents by Inventor Hans-Jorg Gref

Hans-Jorg Gref 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).

  • Metal casing and umbrella
    Patent number: D466685
    Type: Grant
    Filed: July 3, 2001
    Date of Patent: December 10, 2002
    Assignee: Josef Gref GmbH & Co.
    Inventor: Hans-Jorg Gref