Granted Patent
Utility
US 6,718,973 · App. 09/916,290
Evaporation chamber for a respiratory gas humidifier
Inventor:
Jochim Koch
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Jul 30, 2001
Inventor
Jochim Koch
Assignee (at issue)
Dräger Medical AG & Co. KG
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.