Granted Patent
Utility
US 6,198,217 · App. 09/074,421
Organic electroluminescent device having a protective covering comprising organic and inorganic layers
Inventors:
Mutsumi Suzuki, Masao Fukuyama, Yoshikazu Hori
Patented Case
View Patent ↗
Granted: Mar 6, 2001
Filed: May 8, 1998
Inventors
Mutsumi Suzuki
Masao Fukuyama
Yoshikazu Hori
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.