Granted Patent
Utility
US 5,221,231 · App. 07/811,235
Motor vehicle heating/air conditioning system
Inventor:
Alfred Jeckel
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Dec 20, 1991
Inventor
Alfred Jeckel
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.