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Patent US20060086416 - Pencil sharpener - Google Patents

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Patent US6886614 - Pencil sharpener - Google Patents

Patent US6886614 - Pencil sharpener - Google Patents

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Patent US20070251105 - Electric pencil sharpener - Google Patents

Patent EP2078617A1 - Safety device for an electric pencil sharpener

Patent EP2078617A1 - Safety device for an electric pencil sharpener

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