Granted Patent
Utility
US 4,720,047 · App. 06/940,780
Auger for conveying materials such as manure
Inventors:
William Knight, William M. Saunders
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Dec 12, 1986
Inventors
William Knight
William M. Saunders
Assignee (at issue)
KNIGHT MFG., 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.