Patents by Inventor Cornelis A. Visser

Cornelis A. Visser 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).

  • Traffic light
    Patent number: 4384271
    Abstract: A traffic light construction which provides a signal of a high luminous intensity, a gradual brightness variation over a cover glass and a considerable suppression of phantom phenomena. The traffic light has a parabolic reflector having a depth of about its focal length and a converging lens smaller than the cover glass. The lens produces a parallel light beam, which is incident on the central portion of the cover glass which is outside the reach of the parallel beam formed by the reflector.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: May 17, 1983
    Assignee: U.S. Philips Corporation
    Inventor: Cornelis A. Visser