Cellos; Pianos; Plectrums; Violins; Acoustic guitars; Cases for musical instruments; Collapsible guitar stand and seat combination; Guitar bridges; Guitar playing assistance devices, namely, a sliding clamp-like structure positioned onto the guitar neck to form and sound guitar chords and notes; Guitar skins for electric guitars; Music synthesizers; Musical instrument stands; Pedal steel guitars; Pedals for musical instruments; Stands for musical instruments