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Application filed by Politechnika Warszawska, Zaklady Wytworcze Lamp ElektryfiledCriticalPolitechnika Warszawska
Priority to PL27402988ApriorityCriticalpatent/PL157165B2/en
Publication of PL274029A2publicationCriticalpatent/PL274029A2/en
Publication of PL157165B2publicationCriticalpatent/PL157165B2/en