Granted Patent
Utility
US 6,800,002 · App. 10/188,691
Valve timing control for marine engine
Inventors:
Goichi Katayama, Yoshibumi Iwata
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: Jul 2, 2002
Inventors
Goichi Katayama
Yoshibumi Iwata
Assignee (at issue)
Yamaha Marine 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.