Granted Patent
Utility
US 5,369,956 · App. 08/053,009
Exhaust gas aftertreatment device for internal combustion engines
Inventors:
Helmut Daudel, Klaus Marquardt, Uwe Gartner
Patented Case
View Patent ↗
Granted: Dec 6, 1994
Filed: Apr 27, 1993
Inventors
Helmut Daudel
Klaus Marquardt
Uwe Gartner
Assignee (at issue)
MERCEDES-BENZ GROUP AG
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.