Granted Patent
Utility
US 4,321,773 · App. 06/163,984
Rotary chopping cylinder type forage harvester having means for sharpening its shear bar
Inventor:
Phillip F. Fleming
Patented Case
View Patent ↗
Granted: Mar 30, 1982
Filed: Jun 30, 1980
Inventor
Phillip F. Fleming
Assignee (at issue)
Gehl Company
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.