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Poulsen, Valdemar

Poulsen, Valdemar (väl'dumär poul'sun) [key], 1869–1942, Danish electrical engineer. He invented (1898) the telegraphone (an early wire recorder) and the high-frequency Poulsen arc used in wireless telegraphy and radio.

See more Encyclopedia articles on: Electrical Engineering: Biographies

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Poulsen, Valdemar

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See more Encyclopedia articles on: Electrical Engineering: Biographies