Yeon Sik Kang has been granted 9 US patents while listed as an inventor at Posco Co.. The first was granted in 2012 and the most recent in September 2025. Yeon Sik Kang ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Yeon Sik Kang in Seoul, KR.