Granted Patent
Utility
US 4,522,296 · App. 06/580,936
Flail auger for semi-liquid manure spreader
Inventor:
David M. Rieke
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Feb 16, 1984
Inventor
David M. Rieke
Assignee (at issue)
The Paul Revere 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.