• Solving a Pointy Problem

  • 2025/05/06
  • 再生時間： 6 分
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Solving a Pointy Problem

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  • What if one of the world’s most useful inventions was born not in a lab, but in a cluttered workshop — all because a man needed to pay a fifteen-dollar debt?
    Discover how a twist of wire, a flash of genius, and a forgotten inventor named Walter Hunt changed everyday life forever.
    The story behind the safety pin is anything but ordinary…
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あらすじ・解説

What if one of the world’s most useful inventions was born not in a lab, but in a cluttered workshop — all because a man needed to pay a fifteen-dollar debt?
Discover how a twist of wire, a flash of genius, and a forgotten inventor named Walter Hunt changed everyday life forever.
The story behind the safety pin is anything but ordinary…
続きを読む 一部表示

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