Granted Patent
Utility
US 4,906,219 · App. 07/326,170
Cleaning system for a combine
Inventors:
Robert A. Matousek, Jonathan E. Ricketts
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Mar 20, 1989
Inventors
Robert A. Matousek
Jonathan E. Ricketts
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.