 Ramba uchiverenga ndima ino - Muna 1874 akabatana naDavid H. Dunham, weDunham Sons, waakawana patent yekuvandudza mufuremu yesimbi uye mabhiriji ewrestplank, uye muna 1877 Mendelssohn Piano Company yakashambadza yavo yazvino trichord squares yakashandiswa Mathusheks new Duplex Overstrung Scale, iko kuvandudzwa kukuru munhoroondo yekugadzira Piano, uye akataura kuti akagamuchira kurudziro yakabvumirana yemubairo wepamusoro paCentennial Exhibitionmuna 1876, apo Mathushek Piano Manufacturing Co. yakanga yaisawo piyano. 