Granted Patent
Utility
US 5,138,835 · App. 07/704,434
Diesel engine with an exhaust-gas filter
Inventors:
Franz Bender, Dirk Naber
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: May 23, 1991
Inventors
Franz Bender
Dirk Naber
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.