Granted Patent
Utility
US 6,802,288 · App. 10/420,240
Deactivation hydraulic valve lifter having a pressurized oil groove
Inventor:
Mark J. Spath
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Apr 22, 2003
Inventor
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.