Granted Patent
Utility
US 4,577,145 · App. 06/659,917
Charging system having electromagnetic field means for distinguishing between primary and secondary batteries
Inventor:
Ferdinand H. Mullersman
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Oct 11, 1984
Inventor
Ferdinand H. Mullersman
Assignee (at issue)
General Electric Company
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.