Granted Patent
Utility
US 4,944,265 · App. 07/383,504
Oil restricting head gasket construction
Inventor:
Mark Davey
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Jul 24, 1989
Inventor
Mark Davey
Assignee (at issue)
Chrysler Group LLC
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.