Granted Patent
Utility
US 6,098,621 · App. 09/043,234
Disposable oxygenating device
Inventor:
Philip Stuart Esnouf
Patented Case
View Patent ↗
Granted: Aug 8, 2000
Filed: Sep 25, 1998
Inventor
Philip Stuart Esnouf
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.