Granted Patent
Utility
US 4,898,796 · App. 07/268,448
Lead-acid storage battery
Inventors:
Hiroshi Furukawa, Sachio Uemichi, Toshihiro Isoi, Kenzo Kawakita
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Nov 8, 1988
Inventors
Hiroshi Furukawa
Sachio Uemichi
Toshihiro Isoi
Kenzo Kawakita
Assignee (at issue)
Yuasa Battery Co., 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.