Granted Patent
Utility
US 5,456,673 · App. 08/216,813
Locking cannula for endoscopic surgery
Inventors:
Mark Ziegler, Larry Voss
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Mar 23, 1994
Inventors
Mark Ziegler
Larry Voss
Assignee (at issue)
STRYKER CORPORATION
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.