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Application filed by Emil SennfiledCriticalEmil Senn
Publication of CH555EpublicationCriticalpatent/CH555E/de
CH555D1905-01-141905-08-24Zusammenklappbare, an einem Gebäude angebrachte Rettungsleiter mit durch die Sprossen gelenkig verbundenen Holmen
CH555E
(de)