Granted Patent
Utility
US 6,811,546 · App. 09/648,660
Endoscopic surgical access port and method
Inventors:
Peter Callas, John P. Lunsford, Albert K. Chin, Michael Wei
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Aug 25, 2000
Inventors
Peter Callas
John P. Lunsford
Albert K. Chin
Michael Wei
Assignee (at issue)
Origin Medsystems, 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.