Granted Patent
Utility
US 6,677,620 · App. 09/864,263
Organic EL element and method of manufacturing the same
Inventors:
Ikuko Ishii, Yuji Kondo
Patented Case
View Patent ↗
Granted: Jan 13, 2004
Filed: May 25, 2001
Inventors
Ikuko Ishii
Yuji Kondo
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.