Granted Patent
Utility
US 5,741,273 · App. 08/614,074
Elastic band ligation device for treatment of hemorrhoids
Inventor:
Patrick J. O'Regan
Patented Case
View Patent ↗
Granted: Apr 21, 1998
Filed: Mar 8, 1996
Inventor
Patrick J. O'Regan
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.