Granted Patent
Utility
US 5,800,531 · App. 08/723,420
Bioprosthetic heart valve implantation device
Inventors:
Delos M. Cosgrove, Richard Rhee, DIANA Diem-Phuong Nguyen
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Sep 30, 1996
Inventors
Delos M. Cosgrove
Richard Rhee
DIANA Diem-Phuong Nguyen
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.