Devices descending from K974602

2 later devices reach Optical Tracking System (Ots) through their predicates, nearest generation first.

Generation	Number	Device	Applicant	Decided	Own descendants	Recalls
+1	K990632	Optical Tracking System (Ots)	Radionics, Inc.	1999	0	—
+1	K983669	Optical Tracking System with Surface Matching Module, Model Ots	Radionics, Inc.	1998	0	—