Patents by Inventor Robert Henk Van Veldhuizen

Robert Henk Van Veldhuizen 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).

  • Safety starter for fluorescent lamps
    Patent number: 6731073
    Abstract: A fluorescent lamp starter circuit that incorporates the series arrangement of a glow-switch and a semiconductor switch. The semiconductor switch is coupled to a solid state timer. The solid state timer renders the semiconductor switch non-conductive after it has timed a predetermined maximum operation interval. The duration of lamp ignition attempts is thereby limited.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: May 4, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Robert Henk Van Veldhuizen
  • Safety starter for fluorescent lamps
    Publication number: 20030085668
    Abstract: A fluorescent lamp starter circuit that incorporates the series arrangement of a glow-switch and a semiconductor switch. The semiconductor switch is coupled to a solid state timer. The solid state timer renders the semiconductor switch non-conductive after it has timed a predetermined maximum operation interval. The duration of lamp ignition attempts is thereby limited.
    Type: Application
    Filed: October 22, 2002
    Publication date: May 8, 2003
    Inventor: Robert Henk Van Veldhuizen