Granted Patent
Utility
US 5,186,261 · App. 07/720,651
On-land plow assembly with a plurality of adjustable plow units
Inventors:
John H. Will, William L. Grimm
Patented Case
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Granted: Feb 16, 1993
Filed: Jun 25, 1991
Inventors
John H. Will
William L. Grimm
Assignee (at issue)
Case GmbH
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.