Granted Patent
Utility
US 5,878,745 · App. 08/921,169
Gastro-laryngeal mask
Inventor:
Archibald I. J. Brain
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Aug 29, 1997
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.