Patents by Inventor Jan Wieldraaijer

Jan Wieldraaijer 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 with input screen having a profile which satisfies a higher degree polynomial
    Patent number: 4943711
    Abstract: In an image intensifier tube the input screen has a profile which is determined by a higher degree polynomial of which the constant term and the first order term are both zero. As a result of this the profile shows no local inhomogeneities and the profile may be adapted to an optical imaging by the electron-optical system of the photocathode on the output screen.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: July 24, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Gerardus Van Aller, Jan Wieldraaijer