Granted Patent
Utility
US 5,607,440 · App. 08/459,331
Trocar with lockable shield
Inventors:
John K. Danks, Richard V. Mazzola, Thomas R. Johnson
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Jun 2, 1995
Inventors
John K. Danks
Richard V. Mazzola
Thomas R. Johnson
Assignee (at issue)
Endoscopic Concepts, 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.