Granted Patent
Utility
US 4,815,469 · App. 07/166,580
Implantable blood oxygen sensor and method of use
Inventors:
Donald M. Cohen, James E. Barcel, Michael D. Hooven
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Mar 10, 1988
Inventors
Donald M. Cohen
James E. Barcel
Michael D. Hooven
Assignee (at issue)
Siemens Pacesetter, 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.