Granted Patent
Utility
US 5,755,686 · App. 08/790,410
Antegrade/retrograde switch for cardioplegia cannulae
Inventors:
William G. O'Neill, Nelson L. Huldin, Lawrence R. Jones
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: Jan 29, 1997
Inventors
William G. O'Neill
Nelson L. Huldin
Lawrence R. Jones
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.