Granted Patent
Utility
US 6,516,888 · App. 09/701,860
Device and method for regulating fluid flow in a well
Inventors:
Bengt Gunnarson, Per Olav Haughom
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Feb 21, 2001
Inventors
Bengt Gunnarson
Per Olav Haughom
Assignee (at issue)
Triangle Equipment AS
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.