Patents by Inventor Theo Stommen

Theo Stommen 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).

  • Voltage regulated electronic ballast for multiple discharge lamps
    Patent number: 6362575
    Abstract: A method and apparatus for regulating the lamp output voltage in a multiple (parallel) discharge lamp fixture irrespective of the number of operating lamps and based upon monitoring of the lamp filament current. A modification thereof provides constant and equal currents in the discharge lamps irrespective of the number of operating lamps.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: March 26, 2002
    Assignee: Philips Electronics North America Corporation
    Inventors: Chin Chang, Theo Stommen