Granted Patent
Utility
US 5,490,486 · App. 08/318,407
Eight cylinder internal combustion engine with variable displacement
Inventor:
Matthew Byrne Diggs
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Oct 5, 1994
Inventor
Matthew Byrne Diggs
Assignee (at issue)
Ford Motor Company
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.