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Donald Duncan was born on june 6 1892.
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Donald Duncan
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Pedro Flores made the first ever yoyo
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yoyo became popular in 1930.
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Donald bought a yoyo company from Pedro Flores.
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National yoyo day on his birthday.
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duncan made the butterfly that made tricks easier.
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Donald sued Royal and Dell over the use of the word yoyo.
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Duncan trademarked the name yoyo.
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Duncan died on May 15 1971.
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Donald got in the toy industry hall of fame for his yoyos.
