Granted Patent
Utility
US 4,744,366 · App. 06/905,790
Concentric independently inflatable/deflatable multiple diameter balloon angioplasty catheter systems and method of use
Inventor:
G. David Jang
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Sep 10, 1986
Inventor
G. David Jang
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.