Granted Patent
Utility
US 4,711,636 · App. 06/796,301
Catheterization system
Inventor:
Steven F. Bierman
Patented Case
View Patent ↗
Granted: Dec 8, 1987
Filed: Nov 8, 1985
Inventor
Steven F. Bierman
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.