Granted Patent
Utility
US 4,473,001 · App. 06/407,750
Method and apparatus for agitating the contents of a fermentation tank
Inventor:
Herbert Rieger
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Aug 13, 1982
Inventor
Herbert Rieger
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.