Patents by Inventor Johannes Antonius Cornelia Maria de Groot

Johannes Antonius Cornelia 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).

  • Key ring with lamp
    Patent number: D405952
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: February 23, 1999
    Assignee: P.P.C. (Holland) B.V.
    Inventor: Johannes Antonius Cornelia Maria de Groot