Granted Patent
Utility
US 4,660,842 · App. 06/855,800
Agricultural implement with elevation control mechanism
Inventors:
Dwayne B. Watt, Brad K. Eversole
Patented Case
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Granted: Apr 28, 1987
Filed: Apr 24, 1986
Inventors
Dwayne B. Watt
Brad K. Eversole
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.