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detects and produces radio waves.
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builds his first radio equipment, a device that will ring a bell from 30 ft. away.
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establishes first radio link between England and France.
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transmists human speech via radiowaves.
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transmits telegraphic radio messages from Cornwall to Newfoundland
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patents an arc transmission that generates continuous radio waves, producing a frequency of 100 kHz and receivable over 150 miles.
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invents the directional radio antennae.
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invents a high-frequency electric generator that produces radio waves with a frequency of 100 kHz.
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develops a 100 kHz, 2 kW alternator for radio communication.
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FM radio stations begin to use the RDS already in place in Europe.
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