Granted Patent
Utility
US 5,448,991 · App. 07/891,760
Method of measuring the oxygen saturation in pulsating blood flow
Inventors:
Michael Polson, Gregory L. Morris
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Jun 1, 1992
Inventors
Michael Polson
Gregory L. Morris
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.