Granted Patent
Utility
US 6,194,845 · App. 09/433,633
Ballasts with tapped inductor arrangements for igniting and powering high intensity discharge lamps
Inventors:
John G. Konopka, Guang Liu
Patented Case
View Patent ↗
Granted: Feb 27, 2001
Filed: Nov 3, 1999
Inventors
John G. Konopka
Guang Liu
Assignee (at issue)
OSRAM SYLVANIA Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.