Granted Patent
Utility
US 6,723,591 · App. 10/377,985
Organic light emitting devices
Inventors:
Armin Beck, Tilman Beierlein, Peter Mueller, Heike E. Riel, Walter Riess
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Mar 3, 2003
Inventors
Armin Beck
Tilman Beierlein
Peter Mueller
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.