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Application filed by Θεμιστοκλης ΛεφφαςfiledCriticalΘεμιστοκλης Λεφφας
Priority to GR240100613ApriorityCriticalpatent/GR613B/el
Publication of GR613BpublicationCriticalpatent/GR613B/el
GR240100613A1924-04-211924-04-21Διαφραγμα απομονωτικον και αδιαβροχον αντικαθιστωντας εκ πορσελανης μονωτηρα προς εγκαταστασιν τηλεγραφικης γραμμης.
GR613B
(el)