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Patent US6886614 - Pencil sharpener - Google Patents

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Patent US20070251105 - Electric pencil sharpener - Google Patents

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A Guide to Manual and Electric Pencil Sharpeners - Jackson's Art Blog

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It's Academic Manual Pencil Sharpener, Flip Top, Assorted Colors

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Patent US20070251105 - Electric pencil sharpener - Google Patents

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Patent US20120233867 - Pencil sharpener with two blades - Google Patents

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Patent US20060086416 - Pencil sharpener - Google Patents

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Look Sharp. – Present&Correct