Guitars; Musical instruments; Musical instrument stands; Percussion instruments; Bows for musical instruments; Strings for musical instruments; Shoulder rests for violins; String instruments; Violins; Sheet music stands; Guitar playing assistance devices, namely, a sliding clamp-like structure positioned onto the guitar neck to form and sound guitar chords and notes; Strings for Western style musical instruments; Acoustic guitars; Guitar strings; Erhu (a two-stringed bowed musical instrument)...