Granted Patent
Utility
US 6,575,138 · App. 09/863,187
Directly actuated injection valve
Inventors:
Alan B. Welch, Irawan Rahardja, Mike Hebbes
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: May 23, 2001
Inventors
Alan B. Welch
Irawan Rahardja
Mike Hebbes
Assignee (at issue)
Westport Research 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.