Granted Patent
Utility
US 5,740,969 · App. 08/728,342
Piezo-control valve for fuel injection systems of internal combustion engines
Inventors:
Karl-Heinz Hoffmann, Paul Schwerdt, Gerd Huber
Patented Case
View Patent ↗
Granted: Apr 21, 1998
Filed: Oct 9, 1996
Inventors
Karl-Heinz Hoffmann
Paul Schwerdt
Gerd Huber
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.