Granted Patent
Utility
US 6,734,839 · App. 10/050,925
Active matrix display device
Inventor:
Ichio Yudasaka
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Jan 22, 2002
Inventor
Ichio Yudasaka
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.