Automatic player piano exactly reproducing music recorded on oth

Combination acoustic and electronic piano in which the acoustic

Combination acoustic and electronic piano in which the acoustic

Combined acoustic and electronic piano in which the acoustic act

Grand piano-like keyboard instrument for selectively producing a

Keyboard instrument for selectively producing mechanical sounds

Keyboard musical instrument equipped with driving unit for hamme

Keyboard musical instrument equipped with hammer sensors changin

Keyboard musical instrument for practicing fingering on keyboard

Keyboard musical instrument having jacks changeable in escape sp

Keyboard musical instrument having key action mechanisms movable

Keyboard musical instrument having key action mechanisms movable

Keyboard musical instrument having regulable regulating buttons

Keyboard musical instrument with movable key bed for performing

Musical instruments

Piano

Portable foldable electronic piano

Speaker edge, method of foam-molding the same, apparatus for...

Stackable interlocking guitar

Stringed musical instrument with keyboard