Granted Patent
Utility
US 6,215,255 · App. 09/561,679
Electric ballast system
Inventors:
Dae Bong KIM, Nak-Choon Choi
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: May 1, 2000
Inventors
Dae Bong KIM
Nak-Choon Choi
Assignee (at issue)
Fairchild Korea Semiconductor 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.