Granted Patent
Utility
US 4,938,352 · App. 07/433,629
Battery display package
Inventors:
Victor Calcerano, David F. O'Brien
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Dec 7, 1989
Inventors
Victor Calcerano
David F. O'Brien
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.