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ELECTRIC PENCIL SHARPENER WITH A REPLACEABLE CUTTER ASSEMBLY - Patent

ELECTRIC PENCIL SHARPENER WITH A REPLACEABLE CUTTER ASSEMBLY - Patent

Pencil_sharpener_mechanism – JSTM

Pencil_sharpener_mechanism – JSTM

Pencil Sharpener - Patent application

Pencil Sharpener - Patent application

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Patent US7699082 - Electric multi-pencil sharpener - Google Patents

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Patent US20070251105 - Electric pencil sharpener - Google Patents

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