Patents by Inventor Johannes Antonius Cornelis Maria de Groot

Johannes Antonius Cornelis Maria de Groot 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).

  • Clock in shape of cockpit
    Patent number: D412284
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: July 27, 1999
    Assignee: P.P.C. (Holland) B.V.
    Inventor: Johannes Antonius Cornelis Maria de Groot