-
Mobile Phone
In December 1947, Douglas H. Ring and W. Rae Young, Bell Labs engineers, proposed hexagonal cells for mobile phones in vehicles.[ -
Pay Phone on Trains
In 1969 Penn Central Railroad equipped commuter trains along the 225-mile New York-Washington route with special pay phones that allowed passengers to place telephone calls while the train was moving. -
Call Handoff
In 1970 Amos E. Joel, Jr., a Bell Labs engineer, invented an automatic "call handoff" system to allow mobile phones to move through several cell areas during a single conversation without interruption. -
Switching Plans
A cellular telephone switching plan was described by Fluhr and Nussbaum -
iPhone
The iPhone was unveiled to the public
