Granted Patent
Utility
US 6,338,320 · App. 09/457,908
Hydraulically-assisted engine valve actuator
Inventor:
William de Ojeda
Patented Case
View Patent ↗
Granted: Jan 15, 2002
Filed: Dec 8, 1999
Inventor
William de Ojeda
Assignee (at issue)
International Truck and Engine Corporation Canada
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.