Granted Patent
Utility
US 6,517,549 · App. 09/938,339
Medical mouthpiece with elliptical passageway
Inventor:
William G. Dennis
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Aug 24, 2001
Inventor
William G. Dennis
Assignee (at issue)
Core Dynamics Limited
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.