Granted Patent
Utility
US 4,884,889 · App. 07/122,771
Calibration system for coordinate measuring machine
Inventor:
Walter L. Beckwith, Jr.
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Nov 19, 1987
Inventor
Walter L. Beckwith, Jr.
Assignee (at issue)
Brown & Sharpe Manufacturing Co.
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.