Englishman who developed a method of turning iron ore into steel

Man who developed the first successful steamboat

Teacher of deaf-mutes who invented the telephone

Man who developed the assembly line and built the Model T

Man who launched the first successful liquid-fuel rocket ever built

Man who invented the gas mask and the traffic signal

Man who built the steel industry in America

Man who invented the telegraph

Man who invented the phonograph

Man who organized the oil industry in America

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