Granted Patent
Utility
US 6,820,613 · App. 10/390,408
Process and device for controlling the breathing gas supply
Inventors:
Ullrich Wenkebach, Dieter Weismann
Patented Case
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Granted: Nov 23, 2004
Filed: Mar 17, 2003
Inventors
Ullrich Wenkebach
Dieter Weismann
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.