the year 1940
4.49 kilometres (2.79 miles)
martin cooper was the inventor of the mobile phone . the answer for how he invented it is , he was taking a bath and he suddenly sprang up and he wanted to call his fjord . but his phone was in the...
Dr. Martin Cooper (born December 26, 1928 in Chicago), the inventor of the cell phone
Lots of stupid chinese who study marketing or finance. Who wants to study marketing in an institute of technology?