Granted Patent
Utility
US 6,767,667 · App. 09/722,114
Sealed battery
Inventor:
Tsutomu OOSHIMA
Patented Case
View Patent ↗
Granted: Jul 27, 2004
Filed: Nov 27, 2000
Inventor
Tsutomu OOSHIMA
Assignee (at issue)
NEC Tokin Tochigi, 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.