Granted Patent
Utility
US 4,798,597 · App. 07/043,865
Flexible composite intubation tube
Inventor:
Vincent L. Vaillancourt
Patented Case
View Patent ↗
Granted: Jan 17, 1989
Filed: Apr 29, 1987
Inventor
Vincent L. Vaillancourt
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.