Granted Patent
Utility
US 5,615,708 · App. 08/546,945
Flow control valve with non-plugging multi-stage valve trim
Inventor:
Kimball R. Barron
Patented Case
View Patent ↗
Granted: Apr 1, 1997
Filed: Oct 23, 1995
Inventor
Kimball R. Barron
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.