Granted Patent
Utility
US 4,958,731 · App. 07/440,144
Battery package
Inventor:
Victor Calcerano
Patented Case
View Patent ↗
Granted: Sep 25, 1990
Filed: Nov 22, 1989
Inventor
Victor Calcerano
Assignee (at issue)
Duracell 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.