Granted Patent
Utility
US 6,580,090 · App. 09/887,639
Organic light-emitting devices
Inventors:
Siegfried Johannes Barth, Tilman Beierlein, Siegfried F. Karg, Heike E. Riel, Walter Riess
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: Jun 22, 2001
Inventors
Siegfried Johannes Barth
Tilman Beierlein
Siegfried F. Karg
Heike E. Riel
Walter Riess
Assignee (at issue)
International Business Machines 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.