Granted Patent
Utility
US 6,476,550 · App. 09/275,409
Organic Electroluminescent device with a defraction grading and luminescent layer
Inventors:
Atsushi Oda, Hitoshi Ishikawa, Satoru Toguchi
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Mar 24, 1999
Inventors
Atsushi Oda
Hitoshi Ishikawa
Satoru Toguchi
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.