Granted Patent
Utility
US 6,253,765 · App. 09/333,619
Method for determining the volume of a tubing system and a breathing apparatus system
Inventors:
Kurt Hognelid, Goran Skog
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Jun 15, 1999
Inventors
Kurt Hognelid
Goran Skog
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.