Granted Patent
Utility
US 4,648,384 · App. 06/673,793
Retrograde coronary sinus perfusion device and method
Inventor:
Robert Schmukler
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Nov 21, 1984
Inventor
Robert Schmukler
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.