Granted Patent
Utility
US 4,637,406 · App. 06/639,251
Chaff and straw spreading attachment for combines
Inventors:
Ronald K. Guinn, Ferol S. Fell
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Aug 9, 1984
Inventors
Ronald K. Guinn
Ferol S. Fell
Assignee (at issue)
Hesston Corporation
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.