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Patent US7472728 - Electrically powered rapid sharpening cosmetic

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Patent US3678975 - Electric pencil sharpener - Google Patents

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Electronic Pencil Sharpener - Patent application

Patent US3134365 - Electric pencil sharpener - Google Patents

Patent US3134365 - Electric pencil sharpener - Google Patents

ELECTRIC PENCIL SHARPENER WITH A REPLACEABLE CUTTER ASSEMBLY - Patent

ELECTRIC PENCIL SHARPENER WITH A REPLACEABLE CUTTER ASSEMBLY - Patent

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wiring diagram electric pencil sharpener - Wiring Diagram

Patent US7472728 - Electrically powered rapid sharpening cosmetic

Patent US7472728 - Electrically powered rapid sharpening cosmetic

Patent EP2078617A1 - Safety device for an electric pencil sharpener

Patent EP2078617A1 - Safety device for an electric pencil sharpener

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