Granted Patent
Utility
US 4,902,476 · App. 07/056,135
Heat exchanger and blood oxygenator apparatus
Inventors:
Lucas S. Gordon, Richard Bringham
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: May 29, 1987
Inventors
Lucas S. Gordon
Richard Bringham
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.