Granted Patent
Utility
US 4,890,445 · App. 07/240,884
Disc cutter construction
Inventor:
Jack W. Crane
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Sep 2, 1988
Inventor
Jack W. Crane
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.