Ottmar Mergenthaler, at approximately 45 years old - Original

Ottmar Mergenthaler, at approximately 45 years old (the age he died). Per File:OttmarMergenthaler.jpg this was published in 1912 in Iles, George (1912). Leading American Inventors. New York: Henry Holt & Company, p. 392

Originale Ottmar Mergenthaler ultrahohe Auflösung hohe Auflösung

28/10/1899

John Hopkins University

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gemeinfrei