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Parera Raul W
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Parera Raul W
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Priority to ES94484ApriorityCriticalpatent/ES94484A1/es
Publication of ES94484A1publicationCriticalpatent/ES94484A1/es
ES94484A1925-07-101925-07-10Un procedimiento para la fabricación de tubos o recipientes de iluminación eléctrica con gases enrarecidos.
ExpiredES94484A1
(es)