4. Tools and hardware
  5. Other tools and implements
  6. Wrench

Ching Chen

Inventor

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Box end wrench

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

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Control member for ratchet wrench

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

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Mobile tool bit

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

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Ratchet mechanism for tools

192 clutches and power-stop control – Clutches – Automatic
Reexamination Certificate

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Ratchet wrench

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

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Profile ID: LFUS-PAI-P-1011343

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