Granted Patent
Utility
US 5,697,944 · App. 08/559,415
Universal dilator with expandable incisor
Inventor:
Banning G. Lary
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Nov 15, 1995
Inventor
Banning G. Lary
Assignee (at issue)
Interventional Technologies
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.