Achievements Competing in two Summer Olympics, he won a gold medal in the K-2 1000 m event at Melbourne in 1956. Miltenberger also won four medals at the International Coach Federation Canoe Sprint World Championships with two golds (K-1 4 x 500 m: 1958, K-2 500 m: 1954), a silver (K-1 500 m: 1954), and a bronze (K-2 500 m: 1958).