What else did Martin Cooper invent besides the cell phone?
found that the ability to transmit different radio communications simultaneously and in the same place has grown at the same pace since Guglielmo Marconi’s first transmissions in 1895. This knowledge led Cooper to formulate the Law of Spectral Efficiency, otherwise known as Cooper’s Law. The Law states that the maximum number of voice conversations or equivalent data transactions that can be conducted in all of the useful radio spectrum over a given area doubles every 30 months
