Granted Patent
Utility
US 6,447,441 · App. 09/692,900
Non-invasive flow indicator for a rotary blood pump
Inventors:
Yih-Choung Yu, Kirk A. Lehmann, John Chiasson, Wayne P. Griffin
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Oct 20, 2000
Inventors
Yih-Choung Yu
Kirk A. Lehmann
John Chiasson
Wayne P. Griffin
Assignee (at issue)
CardiacAssist, 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.