He was born in Chicago, Illinois, the son of Catholic Irish immigrants, William Mitchell of Sligo and Bridget Keane, of Listowel. He was married to Margaret and had three children. See more

Mitchell became Motorola's chief engineer for its mobile communication products in 1960. Prior to the development of the cell phone, Mitchell and his team of engineers produced and … See more

In 1983, Mitchell was appointed to U.S. President Ronald Reagan's National Security Telecommunications Advisory Committee. He was a senior member of the Institute of Electrical and Electronics Engineers and was a chairman of the Electronic Industries Alliance See more

Mitchell was awarded honorary degrees from the Illinois Institute of Technology in humane letters and science, 1995; an honorary doctorate of business administration from Iowa Wesleyan College, on May 18, 1985, and from Dublin City University (Ollscoil … See more

• U.S. Patent 2,833,994, July 2, 1954 for High Frequency Long-Line Variably End-Loaded with Clarence P. Pipes.
• U.S.Patent 2,912,573, November 10, 1959 for Receiver having frequency and amplitude modulation detecting. See more

• History of mobile phones See more