Granted Patent
Utility
US 6,311,655 · App. 09/488,903
Multi-position variable cam timing system having a vane-mounted locking-piston device
Inventors:
Roger T. Simpson, Michael Duffield, Marty Gardner
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Jan 21, 2000
Inventors
Roger T. Simpson
Michael Duffield
Marty Gardner
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.