Granted Patent
Utility
US 5,316,724 · App. 07/945,998
Multiple blood path membrane oxygenator
Inventors:
Wilfred F. Mathewson, Richard Bringham, Philip L. Ritger, David L. Karshmer
Patented Case
View Patent ↗
Granted: May 31, 1994
Filed: Sep 15, 1992
Inventors
Wilfred F. Mathewson
Richard Bringham
Philip L. Ritger
David L. Karshmer
Assignee (at issue)
Baxter International 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.