Granted Patent
Utility
US 6,685,680 · App. 09/906,539
Tapered intravenous cannula
Inventors:
David S. Utterberg, William J. Schnell
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Jul 16, 2001
Inventors
David S. Utterberg
William J. Schnell
Assignee (at issue)
DSU Medical Corp.
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.