Granted Patent
Utility
US 4,441,512 · App. 06/362,831
Combined air intake screen and access door for combine
Inventor:
Garry W. Busboom
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Mar 29, 1982
Inventor
Garry W. Busboom
Assignee (at issue)
Allis-Chalmers 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.