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2870359
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Patent number 2,870,359
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Patent number 2,724,787
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Issue date Nov 22, 1955
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2704817
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Patent number 2,704,817
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Issue date Mar 22, 1955
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2651736
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Patent number 2,651,736
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2621284
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Patent number 2,621,284
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Issue date Dec 9, 1952
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Patent number 2,540,256
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Patent number 2,495,970
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Patent number 1,607,433
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Patent number 1,404,341
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Patent number 1,344,938
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