Granted Patent
Utility
US 6,143,434 · App. 09/086,554
Organic electroluminescent element material and organic electroluminescent element employing the same
Inventor:
Hisashi Okada
Patented Case
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Granted: Nov 7, 2000
Filed: May 29, 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.