Patents by Inventor Johan Gerrit De Bruin

Johan Gerrit De Bruin 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).

  • Multi-layered collimator
    Patent number: 7349160
    Abstract: A collimator for use in an optical device, such as a display device, includes a multi-layered sheet of at least five alternating light transmitting and light impervious layers. A collimation angle of a few degrees is obtainable using the collimator. The collimator may be produced by co-extruding or injection molding.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: March 25, 2008
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Reinhold Wimberger-Friedl, Hugo Johan Cornelissen, Johan Gerrit De Bruin
  • Method for producing a grid structure
    Patent number: 6707885
    Abstract: A method is provided for producing a grid structure using an extrusion process. In order to extrude a layered structure exhibiting a high aspect ratio, a multiplication die is used. Such a method is also suited to manufacture X-ray scatter grids, which include X-ray absorbing and X-ray transmitting regions. The X-ray scatter grid is designed to be used in an X-ray examination apparatus.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: March 16, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Reinhold Wimberger-Friedl, Jakob Wijnand Mulder, Johan Gerrit De Bruin
  • Method for producing a grid structure
    Publication number: 20020176538
    Abstract: A method to produce a grid structure by means of an extrusion process. In order to extrude a layered structure exhibiting a high aspect ration a multiplication die is used. Such a method is also suited to manufacture X-ray scatter grids, comprising X-ray absorbing (10) and X-ray transmitting (9) regions, said X-ray scatter grid (6) to be used in an X-ray examination apparatus.
    Type: Application
    Filed: December 20, 2001
    Publication date: November 28, 2002
    Inventors: Reinhold Wimberger-Friedl, Jakob Wijnand Mulder, Johan Gerrit De Bruin