Granted Patent
Utility
US 6,048,331 · App. 08/993,202
Cardioplegia occluder
Inventors:
Ross S. Tsugita, Tracy D. Maahs
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Dec 18, 1997
Inventors
Ross S. Tsugita
Tracy D. Maahs
Assignee (at issue)
Embolx, 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.