Granted Patent
Utility
US 4,357,715 · App. 06/198,446
Heart valve prosthesis
Inventor:
Jerome J. Klawitter
Patented Case
View Patent ↗
Granted: Nov 9, 1982
Filed: Oct 20, 1980
Inventor
Jerome J. Klawitter
Assignee (at issue)
Hemex, 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.