Granted Patent
Utility
US 6,621,213 · App. 09/933,499
Organic electroluminescence device and manufacturing method therefor
Inventor:
Toshitaka Kawashima
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Aug 20, 2001
Inventor
Toshitaka Kawashima
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.