Patents by Inventor Roland Sing

Roland Sing 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).

  • Ballast
    Patent number: 6147462
    Abstract: In a ballast for parallel operation of discharge lamps in potentially explosive areas, an inverter is provided which has a branch which is assigned to the two discharge lamps, and in this respect is used twice. Two lamp-specific branches can be switched off separately if a fault occurs at the assigned discharge lamp.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: November 14, 2000
    Assignee: Vossloh-Schwabe Elektronik GmbH
    Inventors: Roland Sing, Gert Knobloch