Granted Patent
Utility
US 4,178,639 · App. 05/894,166
Two-leaflet heart valve
Inventor:
Jack C. Bokros
Patented Case
View Patent ↗
Granted: Dec 18, 1979
Filed: Apr 6, 1978
Inventor
Jack C. Bokros
Assignee (at issue)
Carbomedics 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.