Granted Patent
Utility
US 5,249,571 · App. 07/875,457
Laryngeal clamp airway
Inventor:
Archibald I. J. Brain
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Apr 29, 1992
Inventor
Archibald I. J. Brain
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.