Granted Patent
Utility
US 6,369,504 · App. 09/425,269
Low pressure mercury vapor discharge lamp
Inventors:
Kenji Itaya, Takeshi Matsumura
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Oct 22, 1999
Inventors
Kenji Itaya
Takeshi Matsumura
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.