Granted Patent
Utility
US 4,345,452 · App. 06/066,797
Cam shaft operated punch press for expanding lead alloy battery grid material
Inventor:
William J. Eberle
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: Aug 15, 1979
Inventor
William J. Eberle
Assignee (at issue)
General Battery 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.