Granted Patent
Utility
US 4,709,320 · App. 06/922,373
Low voltage shutdown circuit
Inventor:
John G. Konopka
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Oct 23, 1986
Inventor
John G. Konopka
Assignee (at issue)
Zenith Electronics LLC
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.