Eug Y. Kwack has been granted 6 US patents while listed as an inventor at Sparktech. The first was granted in 1989 and the most recent in May 1993. Eug Y. Kwack ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Eug Y. Kwack in Walnut, CA, US.