Granted Patent
Utility
US 4,343,049 · App. 06/211,760
Electro-chemically machined ring and strut structure for prosthetic heart valves
Inventors:
Bruce E. Fettel, Paul E. Morris, Leo James Lichte
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Dec 1, 1980
Inventors
Bruce E. Fettel
Paul E. Morris
Leo James Lichte
Assignee (at issue)
Shiley Incorporated
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.