Category:US1008291A Mechanism for regulating the expression in apparatus for playing musical instruments (1904 filed, 1911 published) by Edwin Welte, Karl Bockisch

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References[edit]

US patent application 1008291, Edwin Welte, Karl Bockisch, "Mechanism for regulating the expression in apparatus for playing musical instruments", published 1911-11-07 , filed in 1904-08-17.

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US1008291A Mechanism for regulating the expression in apparatus for playing musical instruments by Edwin Welte, Karl Bockisch, p1.png 2,320 × 3,408; 82 KB
US1008291A Mechanism for regulating the expression in apparatus for playing musical instruments by Edwin Welte, Karl Bockisch, p2.png 2,320 × 3,408; 131 KB
US1008291A Mechanism for regulating the expression in apparatus for playing musical instruments by Edwin Welte, Karl Bockisch, p3.png 2,320 × 3,408; 69 KB
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