Granted Patent
Utility
US 4,871,027 · App. 07/216,068
Multiple-edge sod cutter for vibratory plow
Inventors:
Edgar K. Lindstrom, Marvin L. Morris
Patented Case
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Granted: Oct 3, 1989
Filed: Jul 7, 1988
Inventors
Edgar K. Lindstrom
Marvin L. Morris
Assignee (at issue)
J. I. Case 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.