Granted Patent
Utility
US 6,492,772 · App. 09/495,660
HIGH PRESSURE DISCHARGE LAMP, HIGH PRESSURE DISCHARGE LAMP ELECTRODE, METHOD OF PRODUCING THE HIGH PRESSURE DISCHARGE LAMP ELECTRODE, AND ILLUMINATION DEVICE AND IMAGE DISPLAY APPARATUS RESPECTIVELY USING THE HIGH PRESSURE DISCHARGE LAMPS
Inventor:
Nobuyoshi Takeuchi
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Feb 1, 2000
Inventor
Nobuyoshi Takeuchi
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.