Granted Patent
Utility
US 4,869,254 · App. 07/175,115
Method and apparatus for calculating arterial oxygen saturation
Inventors:
Robert T. Stone, Deborah A. Briggs
Patented Case
View Patent ↗
Granted: Sep 26, 1989
Filed: Mar 30, 1988
Inventors
Robert T. Stone
Deborah A. Briggs
Assignee (at issue)
Nellcor Incorporated
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.