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Flashback 1973: First “Mobile Telephone” Call
Cooper, then general manager of Motorola’s communications system division and inventor of the portable handset, called Dr. Joel S. Engel, his rival and then head of research at Bell Labs. Passers-by were apparently bewildered when he held the massive device to his ear and started talking. We don’t know what Cooper and Engel talked about but we do know that the “brick” was 9 inches long, weighted 2 ½ pounds, and took 10 hours to charge.
In the photo below, John F. Mitchell, then Motorola vice president and chief engineer who worked with Cooper, shows off the DynaTAC prototype portable in 1973.
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