Granted Patent
Utility
US 6,595,213 · App. 09/767,221
High-frequency oscillator ventilator
Inventor:
Johan Bennarsten
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Jan 23, 2001
Inventor
Johan Bennarsten
Assignee (at issue)
Siemens Elema AB
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.