Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Αποστολος ΓολεμηςfiledCriticalΑποστολος Γολεμης
Priority to GR550116042ApriorityCriticalpatent/GR16042B/en
Publication of GR16042BpublicationCriticalpatent/GR16042B/en
GR550116042A1955-02-031955-02-03
Engraving of grooved letters and numbers on sheets of cardboard to practice and learn writing, through their coloring.
GR16042B
(en)