Granted Patent
Utility
US 5,592,395 · App. 08/203,253
Method and apparatus for determining and extending a change interval for an operating fluid of a unit
Inventors:
Fritz Braun, Ursula Felger, Otto Jung, Jakob Wojtacki
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Mar 1, 1994
Inventors
Fritz Braun
Ursula Felger
Otto Jung
Jakob Wojtacki
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.