Granted Patent
Utility
US 5,895,077 · App. 08/578,638
Swivel apparatus for fluid transport
Inventor:
Martin Sigmundstad
Patented Case
View Patent ↗
Granted: Apr 20, 1999
Filed: May 3, 1996
Inventor
Martin Sigmundstad
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.