Granted Patent
Utility
US 6,581,594 · App. 09/570,907
Respiratory mask having gas washout vent and gas washout vent for respiratory mask
Inventors:
Joanne Elizabeth Drew, Alexander Virr, Geoffrey Crumblin
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: May 15, 2000
Inventors
Joanne Elizabeth Drew
Alexander Virr
Geoffrey Crumblin
Assignee (at issue)
Resmed Inc.
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.