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3888425
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Patent number 3,888,425
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Issue date Jun 10, 1975
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3881660
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Patent number 3,881,660
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Issue date May 6, 1975
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
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3257080
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Patent number 3,257,080
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Issue date Jun 21, 1966
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...