Patents by Inventor Jacob C. P. Den Dulk

Jacob C. P. Den Dulk 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).

  • Road-marking complex and system for marking roads
    Patent number: 6305874
    Abstract: A first road marking unit with a first base plate is provided with a first light source, and a second road-marking unit with a second base plate is provided with a second light source. A view angle of 0.1≦&agr;≦8° is formed between an interconnecting line, which interconnects the first and the second light sources, and an intersecting line which intersects the interconnecting line. In a view section where the view angle is 0.1≦&agr;≦8°, light beams originating from the first and the second light sources demonstrate a uniform overlap in the view section at a distance a≧40 m from the first light source. Preferably, the distance d between the first light source and the second light source lies in the range from 10 ≦d≦25 cm. The first and the second base plate of the road-marking units are integrated so as to form a base module.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: October 23, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Adrianus C. W. Custers, Pieter W. C. Provo Kluit, Jacob C. P. Den Dulk, Gabrielle J. B. M. Meekes, Wanda S. Kruijt, Lucas L. D. Van Der Poel, Franciscus G. P. Sools, Constance J. E. Saalberg-Seppen