Granted Patent
Utility
US 4,247,970 · App. 06/029,253
Apparatus for forming expanded metal such as battery grids
Inventor:
William C. Bollinger
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Apr 11, 1979
Inventor
William C. Bollinger
Assignee (at issue)
Bernal Rotary Systems, Inc.
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.