Granted Patent
Utility
US 5,541,021 · App. 08/380,158
Alkaline cell
Inventors:
Mitsutoshi Watanabe, Hiroshi Ishiuchi
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: Jan 30, 1995
Inventors
Mitsutoshi Watanabe
Hiroshi Ishiuchi
Assignee (at issue)
HITACHI MAXELL, LTD.
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.