Granted Patent
Utility
US 4,295,729 · App. 06/168,020
Automatic anti-oxidation replenisher control
Inventor:
Kenneth M. Kaufmann
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Jul 14, 1980
Inventor
Kenneth M. Kaufmann
Assignee (at issue)
Pako Corporation
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.