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ENGELS BERNHARD
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ENGELS BERNHARD
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Publication of ES119760A1publicationCriticalpatent/ES119760A1/es
ES0119760A1929-09-231930-09-11PROCEDIMIENTO Y DISPOSITIVO PARA FABRICAR MECáNICAMENTE CRISTAL DE VARIAS CAPAS Y EN ESPECIAL DE DOS CAPAS O INCRUSTADO
ExpiredES119760A1
(es)