ES28733A2 - Un aparato denominado pianógrafo que adherido al piano pase gráficamente al papel lo que se ejecute con cuantos detalles sean necesarios.
- Google Patents
Un aparato denominado pianógrafo que adherido al piano pase gráficamente al papel lo que se ejecute con cuantos detalles sean necesarios.
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ES28733A1901-11-041901-11-04Un aparato denominado pianógrafo que adherido al piano pase gráficamente al papel lo que se ejecute con cuantos detalles sean necesarios.
ExpiredES28733A2
(es)
Un resultado industrial consistente en sobres especiales llamados "Tresor" que se hacen intransparentes aplicándoles un papel suelto que se ajusta a la parte interior de los mismos.