Granted Patent
Utility
US 6,325,812 · App. 09/477,227
Trocar system having expandable port
Inventors:
William Dubrul, Craig Tsuji, John E. Carlson
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Jan 4, 2000
Inventors
William Dubrul
Craig Tsuji
John E. Carlson
Assignee (at issue)
Innerdyne, 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.