Invention or Discovery: Improvement of Self-Playing Pianofortes
Invention: Improvement in "expression" of self-playing pianofortesDate: 1882
Inventor: Schmaele
Birthplace: United States
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| Invention or Discovery: Improvement of Self-Playing PianofortesInvention: Improvement in "expression" of self-playing pianofortesDate: 1882 Inventor: Schmaele Birthplace: United States
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