Granted Patent
Utility
US 4,897,591 · App. 07/047,413
Regulated battery charger
Inventor:
Wayne M. Spani
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: May 6, 1987
Inventor
Wayne M. Spani
Assignee (at issue)
Fisher Scientific Company, L.L.C.
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.