Granted Patent
Utility
US 5,911,708 · App. 09/057,378
Method and apparatus for uninterrupted delivery of radiographic dye
Inventor:
Paul S. Teirstein
Patented Case
View Patent ↗
Granted: Jun 15, 1999
Filed: Apr 8, 1998
Inventor
Paul S. Teirstein
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.