Granted Patent
Utility
US 6,468,675 · App. 09/321,315
Organic electroluminescent device having high luminance efficiency
Inventors:
Hitoshi Ishikawa, Satoru Toguchi, Atsushi Oda
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: May 27, 1999
Inventors
Hitoshi Ishikawa
Satoru Toguchi
Atsushi Oda
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.