Granted Patent
Utility
US 6,437,540 · App. 09/777,860
Battery pack
Inventor:
Satoshi Sonobe
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Feb 7, 2001
Inventor
Satoshi Sonobe
Assignee (at issue)
NEC Mobile Energy Corporation
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.