Patents by Inventor Ralf Romberg

Ralf Romberg 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 For Operation Of A High Pressure Discharge Lamp Operating Device For A High Pressure Discharge Lamp And High Pressure Discharge Lamp With An Operating Device
    Publication number: 20070296349
    Abstract: The invention relates to a method and a device for operation of ah high pressure discharge lamp with a low-frequency current of alternating polarity, whereby the high pressure discharge lamp is operated during a start phase at a higher power than the rated power thereof. According to the invention, the high pressure discharge lamp is provided with a current, at least during the start phase, with a commutation time of less than or equal to 40 microseconds.
    Type: Application
    Filed: July 28, 2005
    Publication date: December 27, 2007
    Applicant: Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen MBH
    Inventors: Michael Bonigk, Matthias Lau, Ralf Romberg
  • Circuit arrangement for operation of incandescent lamps in motor vehicles
    Publication number: 20030193293
    Abstract: Circuit arrangement for operation of incandescent lamps in motor vehicles.
    Type: Application
    Filed: April 15, 2003
    Publication date: October 16, 2003
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCH GLUHLAMPEN MBH
    Inventors: Gunter Hirschmann, Ralf Romberg, Christian Wittig