Granted Patent
Utility
US 4,416,280 · App. 06/329,604
Cardioplegia delivery system
Inventors:
Walter L. Carpenter, Bruce A. Amrine
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Dec 10, 1981
Inventors
Walter L. Carpenter
Bruce A. Amrine
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.