Granted Patent
Utility
US 5,819,422 · App. 08/737,533
Transparent measuring device and method of making
Inventor:
Randal Schafer
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Nov 12, 1996
Inventor
Randal Schafer
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.