Patents by Inventor Joost E. Schrijvers

Joost E. Schrijvers 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).

  • Image intensifier tube
    Patent number: 4213055
    Abstract: In order to achieve a strong and safe construction, the tube wall of an image intensifier tube is provided with at least two comparatively heavy supporting rings. On one of these rings a cup-shaped or spherical, vacuum-tight sealing entrance window of X-ray transparent metal is secured. As a result of the use of an adapted electrode construction and a concave exit screen, the length of the tube is smaller than 1.5 times the effective diameter of the entrance screen.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: July 15, 1980
    Assignee: U.S. Philips Corporation
    Inventors: Joost E. Schrijvers, Martinus W. A. Boers