Granted Patent
Utility
US 5,057,775 · App. 07/518,453
Method of testing control matrices for flat-panel displays
Inventor:
Henry P. Hall
Patented Case
View Patent ↗
Granted: Oct 15, 1991
Filed: May 4, 1990
Inventor
Henry P. Hall
Assignee (at issue)
Genrad, Inc.
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.