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Martin Cooper | Biography, Inventions, & Facts | Britannica
The invention of mobile phones - Science Museum
History of mobile phones | What was the first mobile phone
From ‘the Brick’ to the iPhone, the Cellphone Celebrates 50 Years
Martin Cooper - Students | Britannica Kids | Homework Help
The History Behind the Invention of the First Cell Phone
Who invented the cell phone? - HowStuffWorks
Who invented the first mobile phone? - Telefónica
Martin Cooper: Inventor of the First Mobile Phone - BetterRoaming
The 50-year story of cell phones that changed communication
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