Granted Patent
Utility
US 5,017,616 · App. 07/443,765
Method for improving ventilation during sleep and treating sleep related ventilation abnormalities
Inventor:
Jeffrey Askanazi
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Nov 30, 1989
Inventor
Jeffrey Askanazi
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.