Granted Patent
Utility
US 5,161,497 · App. 07/850,471
Variable valve timing operated engine
Inventors:
Aladar O. Simko, Robert A. Stein
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Mar 11, 1992
Inventors
Aladar O. Simko
Robert A. Stein
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.