Granted Patent
Utility
US 5,857,886 · App. 08/810,598
Organic thin film electroluminescent device and its manufacturing method
Inventors:
Hideaki Iwanaga, Akira Gyoutoku, Shintarou Hara
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: Feb 28, 1997
Inventors
Hideaki Iwanaga
Akira Gyoutoku
Shintarou Hara
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.