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1904 inventions
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1904 renewal
1904 reconstruction
1904 conversions
1904 restorations
1904 renovations
1904 repairing
1904 work's replicas
1904 productions
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1904 model changed
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Inventions of the 1900s
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1901
1902
1903
1904
1906
1907
Subcategories
This category has the following 3 subcategories, out of 3 total.
F
Fleming valves
(8 F)
U
US1008291A Mechanism for regulating the expression in apparatus for playing musical instruments (1904 filed, 1911 published) by Edwin Welte, Karl Bockisch
(4 F)
W
Welte-Mignon
(8 C, 29 F)