Granted Patent
Utility
US 5,809,955 · App. 08/838,591
Hydraulic actuator and variable valve driving mechanism making use of the same
Inventors:
Shinichi Murata, Masahiko Kubo, Jun Isomoto
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Apr 10, 1997
Inventors
Shinichi Murata
Masahiko Kubo
Jun Isomoto
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.