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Reinforced wood bat
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Patent number 6,139,451
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Issue date Oct 31, 2000
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Hillerich & Bradsby Co.
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John A. Hillerich
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3733677
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Patent number 3,733,677
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Issue date May 22, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3709751
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Patent number 3,709,751
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Issue date Jan 9, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL