Granted Patent
Utility
US 4,327,680 · App. 06/245,242
Air intake assembly
Inventor:
Fred R. Dauwalder
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: May 12, 1980
Inventor
Fred R. Dauwalder
Assignee (at issue)
Caterpillar Tractor Co.
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.