The History of Phone Phreaking Blog | RIP: Amos E. Joel, Jr., 1918-2008

The New York Times obituary called him a "cellphone pioneer" and noted that although he had more than 70 patents, he was "perhaps best known for 3,663,762, a 1972 patent that allows a telephone user to make an uninterrupted call while moving from one region to another."  I.e., it enabled cell phones as we know them today.

http://blog.historyofphonephreaking.org/2008/10/rip-amos-e-joel-jr-1918-2008.html

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