Granted Patent
Utility
US 6,552,497 · App. 09/881,355
Light bulb type fluorescent lamp lighting apparatus
Inventors:
Hiroki Nakagawa, Tetsuya Tahara
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Jun 14, 2001
Inventors
Hiroki Nakagawa
Tetsuya Tahara
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.