Granted Patent
Utility
US 6,814,040 · App. 10/731,391
Deactivation roller hydraulic valve lifter
Inventors:
Nick J. Hendriksma, Mark J. Spath
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Dec 9, 2003
Inventors
Nick J. Hendriksma
Mark J. Spath
Assignee (at issue)
Delphi Technologies
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.