Granted Patent
Utility
US 5,628,657 · App. 08/331,528
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Inventors:
Kare Breivik, Arne Smedal, Kare Syvertsen
Patented Case
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Granted: May 13, 1997
Filed: Jan 13, 1995
Inventors
Kare Breivik
Arne Smedal
Kare Syvertsen
Assignee (at issue)
Den Norske Stats Oljeselskap A.S.
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.