Granted Patent
Utility
US 6,508,983 · App. 09/356,762
Exchanger apparatus and method of manufacture
Inventors:
Laura McBurney, Tom Clark, Randy E. Livingston
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Jul 19, 1999
Inventors
Laura McBurney
Tom Clark
Randy E. Livingston
Assignee (at issue)
COBE Cardiovascular, 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.