Granted Patent
Utility
US 5,678,540 · App. 08/408,836
Breathing gas system
Inventors:
Mikael Kock, Claes Eng
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: Mar 23, 1995
Inventors
Mikael Kock
Claes Eng
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.