Granted Patent
Utility
US 5,973,476 · App. 08/890,178
Battery packs including rechargeable and non-rechargeable batteries and related systems and methods
Inventor:
David R. Irvin
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Jul 9, 1997
Inventor
David R. Irvin
Assignee (at issue)
ERICSSON GMBH
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.