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Sydney Frutin Arnold
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Sydney Frutin Arnold
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Priority to ES276841ApriorityCriticalpatent/ES276841A1/es
Publication of ES276841A1publicationCriticalpatent/ES276841A1/es
Dispositivo de silenciaciën para eliminar la perturbaciën originada sobre el altavoz de un aparato principal por la manipulaciën del conmutador de llamada