Granted Patent
Utility
US 5,762,868 · App. 08/565,438
Blood oxygenator and heat exchanger
Inventor:
Ronald J. Leonard
Patented Case
View Patent ↗
Granted: Jun 9, 1998
Filed: Nov 30, 1995
Inventor
Ronald J. Leonard
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.