Granted Patent
Utility
US 6,796,309 · App. 10/005,227
Tracheal tubes
Inventors:
John E. Nash, Paul Benjamin Ridout
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Dec 7, 2001
Inventors
John E. Nash
Paul Benjamin Ridout
Assignee (at issue)
Smiths Group PLC
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.