Granted Patent
Utility
US 4,643,716 · App. 06/863,668
Multi-size ureteral stent
Inventor:
George W. Drach
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: May 15, 1986
Inventor
George W. Drach
Assignee (at issue)
The Kendall Company LP
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.