Granted Patent
Utility
US 4,305,407 · App. 06/206,509
Combine harvester
Inventor:
Frans J. G. C. De Coene
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Nov 13, 1980
Inventor
Frans J. G. C. De Coene
Assignee (at issue)
Sperry Corp.
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.