Ottmar Mergenthaler, German-American engineer, invented the Linotype machine (b. 1854)

Ottmar Mergenthaler (11 May 1854 – 28 October 1899) was a German-American inventor who has been called a second Gutenberg, as Mergenthaler invented the linotype machine, the first device that could easily and quickly set complete lines of type for use in printing presses. This machine revolutionized the art of printing.