Granted Patent
Utility
US 6,448,720 · App. 09/820,712
Circuit for driving an HID lamp
Inventor:
Yiyoung Sun
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Mar 30, 2001
Inventor
Yiyoung Sun
Assignee (at issue)
Matsushita Electric Works R&D Laboratory, 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.