Granted Patent
Utility
US 4,858,618 · App. 06/866,772
Thermodilution method and apparatus for determining right ventricular ejection fraction
Inventors:
Mark A. Konno, John A. Ripley
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: May 23, 1986
Inventors
Mark A. Konno
John A. Ripley
Assignee (at issue)
Baxter Travenol 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.