Granted Patent
Utility
US 6,440,180 · App. 09/064,694
Enclosed storage battery and its manufacturing method
Inventor:
Akira Iwamura
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Apr 22, 1998
Inventor
Akira Iwamura
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.