Dental chair
Dental chair and adjustable head support mechanism therefor
Dental chair headrest
Dental chair headrest locking device
Dental chair headrest locking device
Dental patient chair
Dental patient chair with an adjustable headrest
Dental treatment chair assembly
Detachable adjustable height headrest for a folding chair
Detachable cantilevered headrest having a ratchet mechanism
Detachable head support for a child safety seat
Detachable headrest for aircraft
Detachable wheelchair headrest
Detachable window mountable seat headrest
Device and method for automatically controlling a headrest
Device and method for head restraint
Device for adjusting elevational position of head rest
Device for controlling headrest of treatment equipment
Device for fixing a headrest on a vehicle seat structure
Device for moving headrest back and forth