Granted Patent
Utility
US 6,312,838 · App. 09/312,772
Organic electroluminescent device
Inventors:
Tadashi Ishibashi, Mari Ichimura, Shinichiro Tamura
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: May 17, 1999
Inventors
Tadashi Ishibashi
Mari Ichimura
Shinichiro Tamura
Assignee (at issue)
SONY GROUP 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.