Granted Patent
Utility
US 6,338,730 · App. 08/470,142
Method of using expandable cannula
Inventors:
Peter M. Bonutti, James S. Hawkins
Patented Case
View Patent ↗
Granted: Jan 15, 2002
Filed: Jun 6, 1995
Inventors
Peter M. Bonutti
James S. Hawkins
Assignee (at issue)
Peter M. Bonutti
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.