Granted Patent
Utility
US 6,819,308 · App. 10/036,002
Energy efficient grey scale driver for electroluminescent displays
Inventor:
Chun-Fai Cheng
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Dec 26, 2001
Inventor
Chun-Fai Cheng
Assignee (at issue)
Ifire Technology Corp.
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.