Granted Patent
Utility
US 6,181,084 · App. 09/258,003
Ballast circuit for high intensity discharge lamps
Inventor:
Lake Lau
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Feb 25, 1999
Inventor
Lake Lau
Assignee (at issue)
EGG CO., LTD.
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.