Toshiko Akiyoshi

John F. Mitchell Motorola cellphone pioneer John F. Mitchell, 81, who helped engineer the technology that paved the way for the world's first cellular phone during a 45-year career at Motorola, where he was president from 1980 to 1995, died of cancer June 11 at a hospice in Palatine, Ill., said his son Kevin. As chief engineer for mobile and portable products at Schaumburg, Ill.-based Motorola, Mitchell helped develop the first design for a portable and consumer-friendly cellular telephone system. Motorola's DynaTAC, a radio and telephone cellular system, came out in 1973 and became the basis for the company's first commercial hand-held cellphone. Mitchell strongly...