Granted Patent
Utility
US 5,808,447 · App. 08/798,924
Pulse charging method for rechargeable batteries
Inventor:
Tomohisa Hagino
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Feb 12, 1997
Inventor
Tomohisa Hagino
Assignee (at issue)
SANYO ELECTRIC CO., LTD.
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.