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by Javantea — Oct 2, 2012


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Who developed it first is a matter of some debate, but Ray Butts was awarded the first patent ( U. S. Patent 2, 892, 371 ) and Seth Lover came next ( U. S. Patent 2, 896, 491 ).

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Who developed it first is a matter of some debate, but Ray Butts was awarded the first patent () and Seth Lover came next ().

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