Granted Patent
Utility
US 6,520,182 · App. 09/538,349
Forehead support for a facial mask
Inventor:
Michael Kassipillai Gunaratnam
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Mar 29, 2000
Inventor
Michael Kassipillai Gunaratnam
Assignee (at issue)
Resmed Inc.
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.