4. Abrasive tool making process, material, or composition
  5. With carbohydrate or reaction product thereof

Wan-Li Chang

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Bidirectionally foldable step ladder

Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Collapsible ladder
Patent

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Electric drill completed with a set of grinding equipments

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent

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Locking device for bidirectionally foldable step ladders

Fire escape – ladder – or scaffold – Unitary foldable – rigid scaffold or ladder – Collapsible ladder
Patent

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Profile ID: LFUS-PAI-P-610772

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