Granted Patent
Utility
US 4,801,085 · App. 07/068,234
Dual auger manure spreader
Inventor:
Thomas Fischer
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Jun 30, 1987
Inventor
Thomas Fischer
Assignee (at issue)
Allied Products 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.