Granted Patent
Utility
US 6,781,293 · App. 09/970,993
Organic EL device with high contrast ratio and method for manufacturing the same
Inventor:
Sung Woo Cho
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Oct 5, 2001
Inventor
Sung Woo Cho
Assignee (at issue)
SAMSUNG DISPLAY CO., 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.