Granted Patent
Utility
US 5,221,253 · App. 07/885,789
Urological stent-catheter system having varing diameter stent
Inventor:
Milton E. Coll
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: May 20, 1992
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.