Granted Patent
Utility
US 5,431,676 · App. 08/026,922
Trocar system having expandable port
Inventors:
William Dubrul, Craig Tsuji
Patented Case
View Patent ↗
Granted: Jul 11, 1995
Filed: Mar 5, 1993
Inventors
William Dubrul
Craig Tsuji
Assignee (at issue)
Innerdyne Medical, 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.