Granted Patent
Utility
US 6,679,259 · App. 09/924,694
Process for controlling a respirator
Inventor:
Ralf Heesch
Patented Case
View Patent ↗
Granted: Jan 20, 2004
Filed: Aug 8, 2001
Inventor
Ralf Heesch
Assignee (at issue)
Dräger Medizintechnik GmbH
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.