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Application filed by Αρχιμηδης ΒαλαβανιδηςfiledCriticalΑρχιμηδης Βαλαβανιδης
Priority to GR590120390ApriorityCriticalpatent/GR20390B/el
Publication of GR20390BpublicationCriticalpatent/GR20390B/el
GR590120390A1959-12-051959-12-05Ορθοστατικος τετραπτυχος πτυσσομενος χαρτης της υδρογειου ως εποπτικον μεσον δια τους μαθητας των σχολειων.
GR20390B
(el)