Granted Patent
Utility
US 5,255,676 · App. 07/789,315
Safety sealed tracheal suction system
Inventor:
Ronald D. Russo
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Nov 8, 1991
Inventor
Ronald D. Russo
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.