Granted Patent
Utility
US 5,201,310 · App. 07/792,626
Medico-surgical tube with sealing cuff and a suction lumen at the top of the cuff
Inventor:
Christopher Stratton Turnbull
Patented Case
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Granted: Apr 13, 1993
Filed: Nov 15, 1991
Inventor
Christopher Stratton Turnbull
Assignee (at issue)
Smiths Industries Public Limited Company
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.