Rudolf Waldemar Harbig was a German athlete. As a middle-distance runner, he held two world records in the 800 metres and 400 metres. He died while serving as a sergeant in Nazi Germany's military during World War II. Rudolf Harbig (Germany) set the men's 400 m world record of 46.0 in Frankfurt am Main, Germany on August 12, 1939. It stood 22 months, until Grover Klemmer's 46.0 on June 6, 1941 (equalling it). Wiki link