Granted Patent
Utility
US 5,505,176 · App. 08/256,347
Valve seating noise discriminating system for engine with variable valve operating system
Inventors:
Dairoku Ishii, Toshio Iwata
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: Oct 6, 1994
Inventors
Dairoku Ishii
Toshio Iwata
Assignee (at issue)
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
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.