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  1. Martin Cooper | Biography, Inventions, & Facts | Britannica

  2. The invention of mobile phones - Science Museum

  3. History of mobile phones | What was the first mobile phone

  4. From ‘the Brick’ to the iPhone, the Cellphone Celebrates 50 Years

  5. Martin Cooper - Students | Britannica Kids | Homework Help

  6. The History Behind the Invention of the First Cell Phone

  7. Who invented the cell phone? - HowStuffWorks

  8. Who invented the first mobile phone? - Telefónica

  9. Martin Cooper: Inventor of the First Mobile Phone - BetterRoaming

  10. The 50-year story of cell phones that changed communication

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