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Ring hammer
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Patent number 4,343,438
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Issue date Aug 10, 1982
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Pennsylvania Crusher Corporation
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Anthony W. Slikas
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
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Material reducer
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Patent number 3,936,004
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Issue date Feb 3, 1976
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Pennsylvania Crusher Corporation
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Carl R. Graf
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...