Granted Patent
Utility
US 6,135,110 · App. 09/063,897
Tracheostomy tube
Inventor:
Ronald R. Roy
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Apr 22, 1998
Inventor
Ronald R. Roy
Assignee (at issue)
Sims Portex Inc.
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.