In dictionaries:
john hays hammond
(March 31, 1855 – June 8, 1936) an American mining engineer, diplomat, and philanthropist.
John Coffee Hays
John Coffee "Jack" Hays (January 28, 1817 – April 21, 1883) was an American military officer.
John Hays Hammond Jr.
(April 13, 1888 – February 12, 1965) an American inventor known as "The Father of Radio Control".
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