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3512197
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A43 - FOOTWEAR
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3445873
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Patent number 3,445,873
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Issue date May 27, 1969
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2180277
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Patent number 2,180,277
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Issue date Nov 14, 1939
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A43 - FOOTWEAR