Granted Patent
Utility
US 6,450,139 · App. 09/969,662
Valve timing control system for internal combustion engine
Inventor:
Kotaro Watanabe
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Oct 4, 2001
Inventor
Kotaro Watanabe
Assignee (at issue)
Unisia Jecs Corporation
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.