Sound recording apparatus; sound transmitting apparatus; electric apparatus for commutation, namely, commutators; intercommunication apparatus, namely, telephone apparatus; telephone apparatus; camcorders; video projectors; video telephones; video screens; mechanical signs; signs, luminous; phone wireless earpieces; loudspeakers; dictating machines; sound recording discs, namely, blank audio discs and prerecorded audio discs featuring music; wearable video display monitors; electronic numeric...