4. Expanded, threaded, driven, headed, tool-deformed, or locked-thr
  5. Externally threaded fastener element, e.g., bolt, screw, etc.
  6. Head driving structure

Ling-Fang Chen

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Screw with a convenient screw head

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Head driving structure
Reexamination Certificate

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Screw with a convenient screw head

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Head driving structure
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

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Profile ID: LFUS-PAI-P-2362041

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