Devices descending from K121631

3 later devices reach Simple T Nasal Mask through their predicates, nearest generation first.

Generation	Number	Device	Applicant	Decided	Own descendants	Recalls
+1	K140980	TI Nasal Mask	Respironics, Inc.	2015	2	Class I
+2	K210844	DreamWear Silicone Pillows Mask	Respironics, Inc.	2021	1	—
+3	K253166	F6S Full Face Mask (F6S); P6S Nasal Pillows Interface (P6S)	BMC Medical Co., Ltd.	2026	0	—