History of mobile phones
A cellular telephone switching plan was described by Fluhr and Nussbaum in 1973, and a cellular telephone data signaling system was described in 1977 by Hachenburg et al.
John Francis Mitchell
U.S. Patent 3,906,166, September 16, 1975 for a Radio Telephone System. the cell phone. Martin Cooper, Richard W. Dronsurth, Albert J. Leitich, Charles N. Lynk, James J. Mikulski, John F. Mitchell, Roy A. Richardson, and John H. Sangster. "NOTA BENE:" "Two names were botched" in the original filing; Albert Leitich's surname was erroneously omitted, "and included herein", and the first name of Mikulski was omitted, "but included herein". The original document was refiled by Motorola's legal staff, but has not yet been identified. "The seeds of the idea for a portable cell phone can be traced to James J. Mikulski, which were rejected by Mitchell for lack of sufficient business justifications". "It is rumored that when John Mitchell suddenly recognized during an attempted phone call that his 400MHz phone had inherent limitations, he immediately reversed his previous decision and championed the portable cell phone concept."