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Martin Cooper may not be a famous name, but his invention is known to more than half of the world's population who own a cell phone.
The concept of a handheld phone was in his brain as a child and, with the help of a team from Motorola, the first mobile phone handset was born in 1973. It weighed more than two kilos.
When, standing on a New York street, he made his first phone call from a prototype cell phone, he could not have been able to conceive the success his invention would achieve.
