North Korean firms seeking to supply fake hair, medical devices, chemicals and sanctioned textiles to Russia have filed trademarks with Moscow in another sign of the allies’ booming economic ties.

Three North Korean firms — Chonwon, Mubyong and Kanghyong trading companies — filed trademarks with Russian intellectual property watchdog Rospatent since the start of the year, according to registration documents reviewed by NK News. 

These firms are relatively obscure and few details are available in NK Pro’s corporate database.