Granted Patent
Utility
US 5,998,046 · App. 08/968,297
Green light emitting organic thin film electroluminescent device
Inventors:
Hiroshi Tada, Hiroyuki Endoh, Akira Hirano, Koji Utsugi
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Nov 12, 1997
Inventors
Hiroshi Tada
Hiroyuki Endoh
Akira Hirano
Koji Utsugi
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.