Granted Patent
Utility
US 5,689,443 · App. 08/451,035
Method and apparatus for evaluating scanners
Inventor:
Naganathasastrigal Ramanathan
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: May 25, 1995
Inventor
Naganathasastrigal Ramanathan
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.