Granted Patent
Utility
US 6,228,058 · App. 09/209,225
Sleeve trocar with penetration indicator
Inventors:
William G. Dennis, Michael Prosek
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Dec 10, 1998
Inventors
William G. Dennis
Michael Prosek
Assignee (at issue)
Core Dynamics Limited
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.