Granted Patent
Utility
US 5,256,147 · App. 07/899,751
Reusable trocar with easily replaceable obturator
Inventors:
Claude Vidal, Russell J. Redmond
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Jun 17, 1992
Inventors
Claude Vidal
Russell J. Redmond
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.