Maurice Leblanc
Menchen produced and co-directed (with Michel Carré) "The Miracle (1912 film)", an early full-length, hand-coloured, black-and-white British feature film. In 1915, he was involved with the design of the Norris-Menchen flamethrower. He also owned the original film rights to the "Arsène Lupin" detective novels by Maurice Leblanc, which he sold to Robertson-Cole for $360,000 in 1920.