Granted Patent
Utility
US 6,615,646 · App. 09/842,635
Carbon dioxide sensor for controlling exhaust gas recirculation in diesel engines
Inventor:
Michael Schell
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Apr 27, 2001
Inventor
Michael Schell
Assignee (at issue)
Edwards Systems Technology, 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.