Granted Patent
Utility
US 6,222,934 · App. 09/116,896
Test chart for determining the image quality of an optical scanner
Inventor:
Jenn-Tsair Tsai
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Jul 17, 1998
Inventor
Jenn-Tsair Tsai
Assignee (at issue)
Mustek Systems 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.