Granted Patent
Utility
US 6,250,265 · App. 09/450,456
Variable valve timing with actuator locking for internal combustion engine
Inventor:
Roger T. Simpson
Patented Case
View Patent ↗
Granted: Jun 26, 2001
Filed: Nov 29, 1999
Inventor
Roger T. Simpson
Assignee (at issue)
BorgWarner Inc.
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.