Granted Patent
Utility
US 5,602,323 · App. 08/256,613
Method of manufacturing reference samples for calibrating amount of measured displacement and reference sample, and measuring instrument and calibration method
Inventor:
Tadahiro Ohmi
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: Jul 18, 1994
Inventor
Tadahiro Ohmi
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.