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Patent US20070251105 - Electric pencil sharpener - Google Patents

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Patent US20060086416 - Pencil sharpener - Google Patents

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Patent US20070251105 - Electric pencil sharpener - Google Patents

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Patent EP2078617B1 - Safety device for an electric pencil sharpener

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Patent US7240703 - Automatic pencil sharpener - Google Patents

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Patent US7699082 - Electric multi-pencil sharpener - Google Patents

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Patent US3678975 - Electric pencil sharpener - Google Patents

Patent US20080128050 - Pencil Sharpener with Automatic Shut-off
Patent US20080128050 - Pencil Sharpener with Automatic Shut-off

Pencil Sharpener - Patent application
Pencil Sharpener - Patent application

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Merangue Pencil Sharpener - Electric Pencil Sharpener Blade to Fast