Granted Patent
Utility
US 5,825,538 · App. 08/802,326
Placement tool for retro-reflective calibration points
Inventor:
Joe Walker
Patented Case
View Patent ↗
Granted: Oct 20, 1998
Filed: Feb 18, 1997
Inventor
Joe Walker
Assignee (at issue)
Evans & Sutherland Computer Corporation
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.