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Publication date
Application filed by Ingolfur G. S. EspolínfiledCriticalIngolfur G. S. Espolín
Priority to IS133ApriorityCriticalpatent/IS63B6/is
Publication of IS133A7publicationCriticalpatent/IS133A7/is
Publication of IS63B6publicationCriticalpatent/IS63B6/is
IS133A1931-12-181931-12-18Aðferð til varðveislu á skyri sem heftir eftir vild í skamman eða langan tíma súrmyndun í skyrinu áhvaða súrstigi sem er
IS63B6
(is)
Procédé permettant de faire varier automatiquement l'amplification d'un ou plusieurs tubes électroniques en fonction de variations d'éclairement