Patents by Inventor Eduardus J. Cottaar

Eduardus J. Cottaar 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).

  • Lighting system with a device for reducing system wattage
    Patent number: 5606222
    Abstract: A lighting system having a gas discharge lamp and a stabilization ballast further includes a low loss device to reduce the current through the ballast and lamp, thereby reducing system wattage for energy savings. For a lead-type ballast, the current reducing device is a capacitive device in parallel with the discharge lamp. For a lag-type ballast, the device is an inductive device in parallel with the lamp. The device may be in a housing connected between the lamp ballast and the lamp, or may be included within the outer envelope of the discharge lamp. This enables an existing system to be easily retrofit without disturbing the existing ballast.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: February 25, 1997
    Assignee: Philips Electronics North America Corporation
    Inventors: Eduardus J. Cottaar, Dirk Van Pijkeren