Granted Patent
Utility
US 5,821,733 · App. 08/767,170
Multiple cell and serially connected rechargeable batteries and charging system
Inventor:
Robert R. Turnbull
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Dec 16, 1996
Inventor
Robert R. Turnbull
Assignee (at issue)
Packard Bell NEC
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.