Bridges for musical instruments; Capos; Collapsible guitar stand and seat combination; Guitar playing assistance devices, namely, a sliding clamp-like structure positioned onto the guitar neck to form and sound guitar chords and notes; Guitars; Mouthpieces for musical instruments; Musical instrument tuning apparatus, namely, machine heads, tuning hammers, tuning keys; Musical instruments; Picks for stringed instruments; Replacement parts and fittings for musical instruments; Shoulder rests fo...