Granted Patent
Utility
US 4,834,303 · App. 07/209,127
Sharpening apparatus for forage harvester knives
Inventors:
John R. McClure, Mark K. Chow
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Jun 17, 1988
Inventors
John R. McClure
Mark K. Chow
Assignee (at issue)
Ford New Holland, 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.