Granted Patent
Utility
US 5,727,521 · App. 08/805,360
Cylinder head of an internal-combustion engine
Inventor:
Ulrich Engel
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Feb 24, 1997
Inventor
Ulrich Engel
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.