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(de )
1933-04-08
Ventil fuer Pianospieleinrichtungen
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(de )
1923-06-09
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(de )
1932-10-22
Betonungsvorrichtung fuer orgelartige Tasteninstrumente
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(de )
1929-04-26
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AT129907B
(de )
1932-10-10
Pneumatische Windlade für Orgeln.
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