Granted Patent
Utility
US 5,988,143 · App. 09/079,391
Process for determining the opening time of an injection valve of a common-rail injection system
Inventors:
Martin Dietz, Bernd Lindemann, Erhard Steffen
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: May 15, 1998
Inventors
Martin Dietz
Bernd Lindemann
Erhard Steffen
Assignee (at issue)
Daimlerchrysler 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.