Granted Patent
Utility
US 4,874,411 · App. 07/127,996
Air filtering mechanism
Inventors:
Paul E. M. Snauwaert, Geert Vergote, Daniel C. Witdoek
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Dec 2, 1987
Inventors
Paul E. M. Snauwaert
Geert Vergote
Daniel C. Witdoek
Assignee (at issue)
Ford New Holland, Inc.
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.