Granted Patent
Utility
US 6,050,264 · App. 08/924,636
Laryngeal mask assemblies
Inventor:
Brian Greenfield
Patented Case
View Patent ↗
Granted: Apr 18, 2000
Filed: Sep 5, 1997
Inventor
Brian Greenfield
Assignee (at issue)
Smiths Industries Public Limited Company
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.