Granted Patent
Utility
US 5,176,638 · App. 07/704,083
Regional perfusion catheter with improved drug delivery control
Inventor:
T. Anthony Don Michael
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: May 22, 1991
Inventor
T. Anthony Don Michael
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.