the writing-core being made from substance wearing off during use

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Industry

CPC
B43K19/06

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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B43Writing accessories B43KIMPLEMENTS FOR WRITING OR DRAWING B43K19/00Non-propelling pencils Styles Crayons Chalks

Current Industry

B43K19/06the writing-core being made from substance wearing off during use

Industries

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