Granted Patent
Utility
US 6,612,274 · App. 10/279,912
Variable valve control apparatus for internal combustion engine and method thereof
Inventors:
Isamu Iizuka, Satoru Watanabe
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Oct 25, 2002
Inventors
Isamu Iizuka
Satoru Watanabe
Assignee (at issue)
Hitachi Unisia Automotive, Ltd.
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.