Granted Patent
Utility
US 4,559,648 · App. 06/625,506
Safety control valve for an artificial heart
Inventors:
Klaus Affeld, Axel Mohnhaupt, Frank Jorn
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Jun 28, 1984
Inventors
Klaus Affeld
Axel Mohnhaupt
Frank Jorn
Assignee (at issue)
Thoratec Laboratories Corporation
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.