Granted Patent
Utility
US 6,659,945 · App. 09/897,651
Self retaining retractor ring
Inventors:
Robert J. Ball, Carl Basamania, Keith McGrath, Thomas C. May
Patented Case
View Patent ↗
Granted: Dec 9, 2003
Filed: Jun 29, 2001
Inventors
Robert J. Ball
Carl Basamania
Keith McGrath
Thomas C. May
Assignee (at issue)
DePuy Orthopaedics, 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.