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Ernst Alexanderson Born: 1872Birthplace: Sweden High frequency alternator—Alexanderson built a high frequency machine that would operate at high speeds and produce a continuous wave transmission. His inventions included such fields as railway electrification, motors, telephone relays and radio and television. (1983) Died: 1975Fact Monster/Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.
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