Granted Patent
Utility
US 5,355,879 · App. 08/060,167
Laryngeal-mask construction
Inventor:
Archibald I. J. Brain
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: May 7, 1993
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.