Granted Patent
Utility
US 6,196,220 · App. 09/372,440
Artificial ventilation mask
Inventor:
Ahamed H. Idris
Patented Case
View Patent ↗
Granted: Mar 6, 2001
Filed: Aug 11, 1999
Inventor
Ahamed H. Idris
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.