Granted Patent
Utility
US 4,869,272 · App. 07/188,898
Cleaning system for combines
Inventors:
Jon E. Ricketts, James R. Lucas, Robert A. Matousek
Patented Case
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Granted: Sep 26, 1989
Filed: May 2, 1988
Inventors
Jon E. Ricketts
James R. Lucas
Robert A. Matousek
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.