Granted Patent
Utility
US 5,116,309 · App. 07/704,718
Ureteral stent-catheter system having varying diameter stent
Inventor:
Milton E. Coll
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: May 20, 1991
Inventor
Milton E. Coll
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.