Granted Patent
Utility
US 5,437,256 · App. 08/204,790
Method of checking the operability of a regeneration valve in a tank venting system
Inventors:
Wolfgang Woletz, Hans O. Schroter, Klaus Schust, Hartmut Kolb
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Mar 2, 1994
Inventors
Wolfgang Woletz
Hans O. Schroter
Klaus Schust
Hartmut Kolb
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.