Granted Patent
Utility
US 4,905,693 · App. 07/273,111
Surgical method for using an intraintestinal bypass graft
Inventor:
Biagio Ravo
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Nov 16, 1988
Inventor
Biagio Ravo
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.