Granted Patent
Utility
US 5,183,017 · App. 07/836,760
Air filter device for an internal-combustion engine
Inventor:
Stefan Bopp
Patented Case
View Patent ↗
Granted: Feb 2, 1993
Filed: Feb 19, 1992
Inventor
Stefan Bopp
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.