Frederik H. Kreuger Frederik Hendrik Kreuger ( 14 May 1928 -- 10 January 2015 ) , was a Dutch high voltage scientist and inventor , lived in Delft , the Netherlands , and was professor emeritus of the Delft University of Technology .
Frederik H. Kreuger Frederik Hendrik Kreuger ( 14 May 1928 -- 10 January 2015 ) was a Dutch high voltage scientist , writer , and inventor . He was a professor at the Delft University of Technology in Delft .