Granted Patent
Utility
US 4,444,498 · App. 06/410,039
Apparatus and method for measuring blood oxygen saturation
Inventor:
Stanley O. Heinemann
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Aug 20, 1982
Inventor
Stanley O. Heinemann
Assignee (at issue)
Bentley Laboratories, Inc.
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.