Granted Patent
Utility
US 6,308,564 · App. 09/154,561
Method and apparatus for determining the quantity and quality of a fluid
Inventors:
Volker Wehrmeyer, Wolfgang Porth, Werner Wallrafen, Joachim Acht
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Sep 16, 1998
Inventors
Volker Wehrmeyer
Wolfgang Porth
Werner Wallrafen
Joachim Acht
Assignee (at issue)
Mannesmann VDO 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.