Patents by Inventor Bartel Johannes Verkruijssen

Bartel Johannes Verkruijssen 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).

  • Call back method
    Patent number: 6819753
    Abstract: Communication system comprising one or more exchanges and a number of terminals (telephone sets, facsimile apparatuses, etc.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: November 16, 2004
    Assignee: Privacom B.V.
    Inventor: Bartel Johannes Verkruijssen