Granted Patent
Utility
US 6,460,520 · App. 09/696,408
Exhaust gas recirculation cooler
Inventor:
Raymond Challis
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Oct 25, 2000
Inventor
Raymond Challis
Assignee (at issue)
Senior Investments GmbH
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.