Granted Patent
Utility
US 4,745,928 · App. 06/858,448
Right heart ejection fraction and cardiac output catheter
Inventors:
William E. Webler, Edward E. Elson, Michael D. Quinn
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: May 1, 1986
Inventors
William E. Webler
Edward E. Elson
Michael D. Quinn
Assignee (at issue)
American Hospital Supply Corp.
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.