Ostrolenk, Faber, Gerb & Soffen
Sound board assembly for an upright piano
 In construction of a sound board assembly for an upright piano, a unitary rectangular sound board support includes an outer bank corresponding to the conventional sound board base and a rearwardly stepped inner bank corresponding to the conventional base frame in order to remove necessity for surface finish and enable easy and free position adjustment at attachment of a sound board. 
Nippon Gakki Seizo Kabushiki Kaisha
G
G10C
inventional
Yasutoshi Hideo
Kaneko Yamashita