Granted Patent
Utility
US 6,074,294 · App. 09/298,969
Single shaft film valve drive
Inventor:
Mark Stevenson
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Apr 23, 1999
Inventor
Mark Stevenson
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.