Granted Patent
Utility
US 5,651,247 · App. 08/492,620
Exhaust gas purification system
Inventor:
Gerhard Frankle
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Jun 20, 1995
Inventor
Gerhard Frankle
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.