Granted Patent
Utility
US 6,068,940 · App. 09/082,794
Material for organic electroluminescent device and organic electroluminescent device fabricated using said material
Inventor:
Taizou Tanaka
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: May 22, 1998
Inventor
Taizou Tanaka
Assignee (at issue)
NEC CORPORATION
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.