who invented the radiotelegraph system
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None
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Guglielmo Marconi
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Bette Nesmith Graham
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Elias Howe
B
Correct answer
Explanation
Guglielmo Marconi invented the radiotelegraph system, developing wireless telegraphy that could transmit messages across oceans. He won the 1909 Nobel Prize in Physics for this work. Elias Howe invented the sewing machine, and Bette Nesmith Graham created correction fluid.