Granted Patent
Utility
US 4,908,012 · App. 07/229,624
Chronic ventricular assist system
Inventors:
John C. Moise, Richard K. Wampler, Kenneth C. Butler
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Aug 8, 1988
Inventors
John C. Moise
Richard K. Wampler
Kenneth C. Butler
Assignee (at issue)
Nimbus 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.