Granted Patent
Utility
US 6,194,090 · App. 09/185,035
Organic electroluminescence device material and organic electroluminescence device using the same
Inventor:
Hisashi Okada
Patented Case
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Granted: Feb 27, 2001
Filed: Nov 3, 1998
Inventor
Hisashi Okada
Assignee (at issue)
Fujitsu Limited
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.