Granted Patent
Utility
US 5,695,471 · App. 08/603,536
Sealless rotary blood pump with passive magnetic radial bearings and blood immersed axial bearings
Inventor:
Richard K. Wampler
Patented Case
View Patent ↗
Granted: Dec 9, 1997
Filed: Feb 20, 1996
Inventor
Richard K. Wampler
Assignee (at issue)
Kriton Medical, 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.