Granted Patent
Utility
US 5,035,709 · App. 07/502,158
Mechanical heart valve with compliant sewing ring
Inventors:
David W. Wieting, Than Nguyen, Robert Stobie, Hung L. Lam, Ralph Kafesjian
Patented Case
View Patent ↗
Granted: Jul 30, 1991
Filed: Mar 29, 1990
Inventors
David W. Wieting
Than Nguyen
Robert Stobie
Hung L. Lam
Ralph Kafesjian
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.