Granted Patent
Utility
US 6,769,666 · App. 10/145,441
Variable port valve plug
Inventors:
Randy Hall, Ronald Burr
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: May 14, 2002
Inventors
Randy Hall
Ronald Burr
Assignee (at issue)
Fisher Controls International LLC
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.