15 KEYBOARD INSTRUMENTS; NAMELY, HARPSICHORDS, SPINETS, VIRGINALS, CLAVICHORDS, ORGANS, CLAVICYTHERIUMS, PIANO-FORTES, PIANOS, AND PARTS THEREOF; CASES FOR KEYBOARD INSTRUMENTS; SOUND BOARDS FOR KEYBOARD INSTRUMENTS; MUSICAL INSTRUMENT COVERS; BRIDGES FOR STRINGED INSTRUMENTS; JACKS FOR KEYBOARD INSTRUMENTS; TONGUES; LANGUETS; AND PLECTRA