Together with his wife Käthe Paulus, Lattemann designed a parachute prototype in an attempt to make balloon flights safer. The main invention was to have parachutes folded and packed in bags.
Lattemann died during a test. At age 42, his parachute failed to open, although his wife's parachute did open, when they both jumped out of a balloon named "Fin de Siècle", and she watched his fall in horror. Little or no money was made from this invention following his death, but during World War I improvements made by his wife and sold as Paula's parachute, made her a fortune, lost later on due to inflation.
^Early Parachutes including images of the Paula's Parachute. She had patented the improvements in 1910, and in 1912 opened a company in Berlin manufacturing 7000 parachutes. (South African Military History website)