In fact, it was on 3 April 1973 that Motorola employee Martin Cooper made a call in New York on a Motorola DynaTAC to his rival, Joel S.
In fact, it was on 3 April 1973 that Motorola employee Martin Cooper made a call in New York on a Motorola DynaTAC to his rival, Joel S. Engel of Bell Labs, from a street corner in New York.