The Patent Office コンテンツアーカイブ

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  1. The Burr That Became Velcro
  2. The Zipper: Thirteen Years in the Dark
  3. The QR Code: Born on a Toyota Factory Floor
  4. The Microwave Oven: Born from a Radar Accident
  5. WD-40: The Fortieth Try
  6. The K-Cup: An Inventor's Regret