Granted Patent
Utility
US 5,964,800 · App. 08/912,021
Methods for rotating a prosthetic heart valve within a sewing ring
Inventors:
Robert Sparks, Chris Kingsbury, David W. Wieting
Patented Case
View Patent ↗
Granted: Oct 12, 1999
Filed: Aug 15, 1997
Inventors
Robert Sparks
Chris Kingsbury
David W. Wieting
Assignee (at issue)
Baxter International 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.