위르겐 헤프너

The improved reliability of the semiconductor device control

위르겐 헤프너, 미카엘 다비드손, 롤란드 실예스트룀, 2011 .

Device and method to break the current of a power transmission or distribution line and current limiting arrangement

위르겐 헤프너, 비외른 야콥손, 2009 .