Commutators; Sonar; Animal signalling rattles for directing livestock; Densitometers not for medical use; Electric fences; Electric meters; Electrical plugs and sockets; Electrified fences; Electronic animal confinement systems; Electronic collars to train animals; Global positioning system (GPS) apparatus; Inspection mirrors; Luminous traffic signals; Magnifying glasses; Magnifying glasses that fit on the user's face in the manner of eyeglasses; Optical condensers; Optical lamps; Optical lan...