Granted Patent
Utility
US 5,575,283 · App. 08/387,186
Device for determining an opening pressure in the lungs
Inventor:
Ulf Sjoestrand
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Feb 13, 1995
Inventor
Ulf Sjoestrand
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.