Granted Patent
Utility
US 4,397,049 · App. 06/302,597
Hydraulically actuated cardiac prosthesis with three-way ventricular valving
Inventors:
Thomas C. Robinson, Sotiris Kitrilakis
Patented Case
View Patent ↗
Granted: Aug 9, 1983
Filed: Sep 15, 1981
Inventors
Thomas C. Robinson
Sotiris Kitrilakis
Assignee (at issue)
Foxcroft Associates
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.