Granted Patent
Utility
US 4,880,304 · App. 07/033,406
Optical sensor for pulse oximeter
Inventors:
Jonathan Paul Jaeb, Dennis W. Gilstad, Ronald L. Branstetter
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Apr 1, 1987
Inventors
Jonathan Paul Jaeb
Dennis W. Gilstad
Ronald L. Branstetter
Assignee (at issue)
Nippon Colin Company Ltd.
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.