Granted Patent
Utility
US 5,961,549 · App. 08/833,176
Multi-leaflet bioprosthetic heart valve
Inventors:
Than Nguyen, Hung L. Lam, Jianbo Zhou, Carlos M. Romero, Ralph Kafesjian, Xiaoming G. Guo, Van Huynh
Patented Case
View Patent ↗
Granted: Oct 5, 1999
Filed: Apr 3, 1997
Inventors
Than Nguyen
Hung L. Lam
Jianbo Zhou
Carlos M. Romero
Ralph Kafesjian
Xiaoming G. Guo
Van Huynh
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.