Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/6416001
Is Reference of Keksijäntodistus-fi#Sense
Erfinderschein-de#Sense
Inventor's certificate-en#Sense
Uitvinderscertificaat-nl#Sense
Certificat d'inventeur-fr#Sense