Granted Patent
Utility
US 6,622,678 · App. 10/175,276
Apparatus and method for controlling variable valve mechanism
Inventors:
Hirokazu Shimizu, Kenichi Machida
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Jun 20, 2002
Inventors
Hirokazu Shimizu
Kenichi Machida
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.