Granted Patent
Utility
US 5,845,487 · App. 08/897,769
Method and device for operating an internal combustion engine with low nitrogen oxide emissions
Inventors:
Gerhard Fraenkle, Klaus-Juergen Marquartdt
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Jul 21, 1997
Inventors
Gerhard Fraenkle
Klaus-Juergen Marquartdt
Assignee (at issue)
Daimler-Benz 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.