Granted Patent
Utility
US 5,485,090 · App. 08/017,053
Method and apparatus for differentiating battery types
Inventor:
Charles S. Stephens
Patented Case
View Patent ↗
Granted: Jan 16, 1996
Filed: Feb 11, 1993
Inventor
Charles S. Stephens
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.