Granted Patent
Utility
US 4,818,928 · App. 07/103,622
Battery pack
Inventor:
John F. Schosser
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Oct 1, 1987
Inventor
John F. Schosser
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.