Granted Patent
Utility
US 4,412,549 · App. 06/316,253
Combine harvester with improved cleaning
Inventor:
E. William Rowland-Hill
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Oct 29, 1981
Inventor
E. William Rowland-Hill
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.