1
Eugene N Scarberry, Patrick M Handke: Respiratory mask with floating seal responsive to pressurized gas. Respironics, J Stewart Brams, February 20, 1996: US05492116 (179 worldwide citation)

A respiratory mask adapted to confront the face of a user in a manner to float with respect to the user's face on a cushion of gaseous medium contained within the mask for user breathing, the gaseous medium being contained within the mask by a flexible seal means carried by the mask and maintained i ...


2
Eugene N Scarberry, Patrick M Handke: Respiratory mask with floating seal responsive to pressurized gas. Respironics, J Stewart Brams, August 12, 1997: US05655527 (147 worldwide citation)

A respiratory mask adapted to confront the face of a user in a manner to float with respect to the user's face on a cushion of gaseous medium contained within the mask for user breathing, the gaseous medium being contained within the mask by a flexible seal means carried by the mask and maintained i ...


3
FACIAL MASK APPARATUS AND METHOD OF MAKING. February 1, 2018: US20180028772-A1

A face mask for extended wear by a user including a customized, contoured facial mask portion constructed and configured to cover and matingly contact a corresponding contoured surface area of a human face, preferably formed by 3D printing methods and materials.


4
FACIAL MASK APPARATUS AND METHOD OF MAKING. October 18, 2018: US20180296783-A1

A face mask for extended wear by a user including a customized, contoured facial mask portion constructed and configured to cover and matingly contact a corresponding contoured surface area of a human face, preferably formed by 3D printing methods and materials.