Granted Patent
Utility
US 4,416,549 · App. 06/327,792
Apparatus for agitating and pumping a liquid slurry
Inventor:
Stephen L. Kretschmer
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Dec 7, 1981
Inventor
Stephen L. Kretschmer
Assignee (at issue)
A. O. Smith Harvestore Products, Inc.
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.