Granted Patent
Utility
US 4,492,036 · App. 06/569,997
Magnetic ball bar gauge
Inventor:
Walter L. Beckwith, Jr.
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Jan 11, 1984
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.