Granted Patent
Utility
US 6,690,118 · App. 10/132,546
Color electroluminescence display device
Inventor:
Ryoichi Yokoyama
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Apr 25, 2002
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.