North Korea is a poor, communist and very isolated country, that is not very active on the international stage (except when it comes to nuclear weapons). It therefore is also not party to a large number of multilateral conventions.
North Korea is however party to a significant number of treaties of the WIPO (World Intellectual Property organization) (see here. This includes the Patent Law Treaty (since last month), the Lisbon System ("appellations of origin"), the Hague system (designs) and the Madrid System (Trademarks). Especially the Lisbon system has not many members, which makes the move of North Korea all the more surprising...
My question is: why does North Korea choose to give priority to adhering to these conventions?