Engineer Martin Cooper holds the Motorola DynaTAC phone, the world's first commercial handheld cellular phone, and his current mobile phone during a news conference in Oviedo, Spain, in 2009.
PHOTO: Eloy Alonso/Reuters/File
Engineer Martin Cooper holds the Motorola DynaTAC phone, the world's first commercial handheld cellular phone, and his current mobile phone during a news conference in Oviedo, Spain, in 2009.
PHOTO: Eloy Alonso/Reuters/File
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