Hugo Junkers was researching internal combustion engine improvements as early as 1888, co-founded his first engine company in 1890, and patented the opposed-piston Diesel engine in 1892. Other Junkers companies began building aircraft and experimental aircraft engines during WWI. Junkers Motorenwerke AG (Jumo) produced successful aircraft Diesel, spark-ignition and gas turbine engines through WWII.
More information about Hugo Junkers and his companies is available from the Hugo Junkers Homepage
