Granted Patent
Utility
US 5,831,350 · App. 08/573,029
System using interchangeable nickel-based and lithium ion battery packs
Inventors:
Steven Kent McConkey, Nathan Mitchell, Joseph F. Freiman
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Dec 15, 1995
Inventors
Steven Kent McConkey
Nathan Mitchell
Joseph F. Freiman
Assignee (at issue)
Compaq Computer 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.