Granted Patent
Utility
US 4,179,884 · App. 05/822,846
Watercooled exhaust manifold and method of making same
Inventor:
Werner H. Koeslin
Patented Case
View Patent ↗
Granted: Dec 25, 1979
Filed: Aug 8, 1977
Inventor
Werner H. Koeslin
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.