Granted Patent
Utility
US 5,931,128 · App. 09/010,623
Variable valve mechanism and internal combustion engine with the same
Inventors:
Shinichi Murata, Jun Isomoto, Hideo Nakai
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Jan 22, 1998
Inventors
Shinichi Murata
Jun Isomoto
Hideo Nakai
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.