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Individual
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Individual
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Priority to ES75934ApriorityCriticalpatent/ES75934A3/es
Publication of ES75934A3publicationCriticalpatent/ES75934A3/es
ES75934A1920-10-061920-10-06Un sistema de máquinas neumáticas para el taladro automático de papeles de música para aparatos para tocar el piano.
ExpiredES75934A3
(es)