Calorimeters; Headphones; Access control and alarm monitoring systems; Adapter plugs; Apparatus and instruments for weighing; Baby monitors; Baby scales; Backpacks especially adapted for holding laptops; Bags specially adapted for protective helmets; Bicycle safety lights; Body fat scales for household use; Disposable plastic gloves for laboratory use; Earphones and headphones; Fire alarms; Mouth guards for sports; Movable sockets