Granted Patent
Utility
US 4,768,525 · App. 07/091,494
Stone ejection door mechanism for harvesting equipment
Inventor:
Dale R. Tanis
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Aug 31, 1987
Inventor
Dale R. Tanis
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.