Granted Patent
Utility
US 5,354,330 · App. 08/122,802
Heart valve prosthesis
Inventors:
Donald W. Hanson, Richard W. Kramp, Manuel A. Villafana
Patented Case
View Patent ↗
Granted: Oct 11, 1994
Filed: Sep 16, 1993
Inventors
Donald W. Hanson
Richard W. Kramp
Manuel A. Villafana
Assignee (at issue)
ATS Medical, 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.