Granted Patent
Utility
US 5,401,244 · App. 08/238,416
Method of, and stylet apparatus for, installing a retrograde coronary cannula
Inventors:
Christopher M. Boykin, Thomas T. Vaalburg
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Apr 28, 1994
Inventors
Christopher M. Boykin
Thomas T. Vaalburg
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.