Granted Patent
Utility
US 6,720,236 · App. 10/247,360
Mask and method of manufacturing the same, electro-luminescence device and method of manufacturing the same, and electronic instrument
Inventor:
Shinichi Yotsuya
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Sep 20, 2002
Inventor
Shinichi Yotsuya
Assignee (at issue)
SEIKO EPSON 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.