Cell phone photo timeline

1922: Pioneer
The police in Chicago experiment with a radio telephone which broadcast at a frequency just above the AM radio band


1940s: Horseback
The US Army Signal Corps communicate via radio in the field during wartime.


1959: Commercial Model
Reginald Blevins, the Postmaster General of the UK, inaugurates the first radio telephone service for motorists.


1972: Portable
A model shows off a unit that could dial into telephone systems, displayed at a London exhibition entitled, "Communications Today, Tomorrow and the Future."


1983: Inventor
Martin Cooper is credited with developing the first cell phone approved for commercial use.