Stefan Kudelski (27 August 1931 – 26 January 2013) was a  Polish audio engineer known for creating the Nagra series of professional audio recorders.
Life and career
Stefan Kudelski was born in
Warsaw into a family with engineering background. In September 1939 the family fled Poland during the Nazi German and Soviet Invasion of Poland. They escaped to Romania, then moved to Hungary, and on to France. When the Germans occupied southern Vichy France, the family escaped to Switzerland in 1943. He studied at the Swiss Federal Institute of Technology in Lausanne and constructed his first tape recorder there, as a student project. The recorder was supposed to drive a machine tool, but was good enough to record audio as well.
1951 - Kudelski built his first Nagra tape recorder
1957 - The Nagra III, a transistorized tape recorder with electronic speed control, is launched
Kudelski received many awards during his career:
Stefan Kudelski retired in 1991 and was succeeded by his son,
André, as a Chairman and CEO of the Kudelski Group.
He died on 26 January 2013 in
^ a b
Death of Mr Stefan Kudelski , Nagra
^ Academy Awards Data Base
 "Stefan Kudelski"
^ NATIONAL ACADEMY OF TELEVISION ARTS AND SCIENCES,
Outstanding Achievement in Technical/Engineering Development Awards
"page 5" "Archived copy" (PDF). Archived from the original (PDF) on 2013-10-08 . Retrieved . 2013-10-17
Thomas Mulier (Jan 28, 2013). "Stefan Kudelski, Sound-Recording Equipment Inventor, Dies at 84". Bloomberg. External links
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