Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/12
Is Reference of Brevet additionnel-fr#Sense
Zusatzpatent-de#Sense
Verbeteringsoctrooi-nl#Sense
Patent of addition-en#Sense
Certificat d'addition-fr#Sense
Aanvullingsoctrooi-nl#Sense
Certificat de perfectionnement-fr#Sense
Tillægspatent-da#Sense
Zusatz-de#Sense
Brevetto completivo-it#Sense