Granted Patent
Utility
US 6,281,634 · App. 09/451,452
Color electroluminescence display device
Inventor:
Ryoichi Yokoyama
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Nov 30, 1999
Inventor
Ryoichi Yokoyama
Assignee (at issue)
SANYO ELECTRIC CO., LTD.
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.