Patents by Inventor Jozef Alma Lodewijk Maria Ghijselen

Jozef Alma Lodewijk Maria Ghijselen 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).

  • Method and system for operating a discharge lamp such as to detect defective operation of the lamp
    Patent number: 8174211
    Abstract: A method for detecting defective operation of a discharge lamp includes determining the lamp impedance and establishing that the lamp is operating in an incandescent mode if it is found that the lamp has a positive impedance.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: May 8, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Marcel Johannes Maria Bucks, Engbert Bernard Gerard Nijhof, Jozef Petrus Emanuel De Krijger, Jozef Alma Lodewijk Maria Ghijselen