4. Illumination
  5. With implement or hand held holder therefor
  6. Hand tool

Chen-Chi Chang

Inventor

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Ratchet screwdriver with illumination function

Illumination – With implement or hand held holder therefor – Hand tool
Patent

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Screwdriver grip

Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning
Design Patent

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Screwdriver grip structure

Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1804356

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