Granted Patent
Utility
US 6,508,250 · App. 09/534,646
Disposable oxygenating device
Inventor:
Philip Stuart Esnouf
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Mar 23, 2000
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.