Oskar Barnack was a German precision mechanic. Between 1913 and 1914 he was head of development of the camera company Leitz in Wetzlar, Hesse, Germany. He was the driving force behind the making of the first mass-marketed 35mm camera. The onset of World War I kept the first Leica from being manufactured until 1924, and it was not introduced to the public until 1925. Leica stood for Leitz Camera. Wikipedia
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Oskar Barnack was inducted into the International Photography Hall of Fame and Museum in 1984. His honorary plaque is sponsored by the University of Princeton , Class of 1934 to honor Frederick Quellmalz . Barnack's ingenious invention set fourth new er www.iphf.org/Hall_Of_Fame/Inducties_Bios/Oskar_Barnack_Bi...