4. Tools
  5. Wrench, screwdriver, or driver therefor
  6. Machine

Shiu-Mei Cheng

Inventor

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Ratchet tool

Tools – Wrench – screwdriver – or driver therefor – Machine
Patent

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Ratchet tool operatable at a small angle

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

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Profile ID: LFUS-PAI-P-1818756

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