Granted Patent
Utility
US 4,649,622 · App. 06/647,122
Tool changing apparatus for a punch press
Inventor:
William B. Scott
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Sep 4, 1984
Inventor
William B. Scott
Assignee (at issue)
W.A. Whitney 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.