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Single-motor shredder
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Patent number 8,091,814
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Issue date Jan 10, 2012
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Chao-Lung Su
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
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Paper feeding device for shredder
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Patent number 7,823,873
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Issue date Nov 2, 2010
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Chao-Lung Su
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...