Patents by Inventor Nicolaas R. de Graaf

Nicolaas R. de Graaf 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).

  • Paging receiver
    Patent number: 4422071
    Abstract: Paging receiver including a memory for a predetermined address code, a comparator to determine the equality between this address code and a received address code and a message coding device cooperating with a display to represent a received message code, the memory being free-programmable from the exterior to store therein at least one desired selectable address code which may be represented on the display.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: December 20, 1983
    Assignee: Nira International B.V.
    Inventor: Nicolaas R. de Graaf