[ Data processing apparatus; Computer memory devices; Optical readers; Blank USB flash drives; Cabinets for loudspeakers; Diaphragms in the nature of electroacoustic transducers; Microphones; Horns for loudspeakers; Headphones; Portable media players; Electronic book readers; ] Earphone [ ; Transistor radio; Learning machines, namely, computers; Electronic teaching and studying machines, namely, computers; Electronic audible devices, namely, portable media players for use with electronic...