Granted Patent
Utility
US 6,312,443 · App. 09/467,944
Expandable cannula
Inventor:
Corbett W. Stone
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Dec 21, 1999
Inventor
Corbett W. Stone
Assignee (at issue)
NuVasive, 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.