Granted Patent
Utility
US 5,640,080 · App. 08/498,610
Secondary battery charger
Inventors:
Mikitaka Tamai, Tooru Amazutsumi
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Jul 6, 1995
Inventors
Mikitaka Tamai
Tooru Amazutsumi
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.