Granted Patent
Utility
US 6,545,409 · App. 09/853,023
Organic light-emitting diode with high contrast ratio
Inventor:
Keith B. Kahen
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: May 10, 2001
Inventor
Keith B. Kahen
Assignee (at issue)
EASTMAN KODAK COMPANY
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.