Granted Patent
Utility
US 5,180,364 · App. 07/725,694
Valved self-perfusing catheter guide
Inventor:
Robert Ginsburg
Patented Case
View Patent ↗
Granted: Jan 19, 1993
Filed: Jul 3, 1991
Inventor
Robert Ginsburg
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.