Granted Patent
Utility
US 4,384,397 · App. 06/142,625
Tool changing machining center with swing spindle
Inventor:
James A. Nelson
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Apr 22, 1980
Inventor
James A. Nelson
Assignee (at issue)
Giddings & Lewis, LLC
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.