Gustav Waldemar Elmen was a Swedish–American researcher.
Early life Gustav Waldemar Elmen was born on 22 December 1876 in Stockholm, Sweden. He emigrated to the United States in 1893 and became a U.S. citizen in 1918.
Career As a researcher, he worked at the Bell Telephone Laboratories. At Bell Laboratories, he invented magnetic alloys such as Permalloy. His finding paved the way for high-capacity undersea telegraph lines.
In 1941, he founded Naval Artillery laboratory.
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