Junkers studying electrical engineering and thermodynamics in Berlin, then went to work for Deutsche Continental Gasgesellschaft. There he worked on an early two-stroke engine and invented a calorimeter which he exhibited at the 1893 Columbian Exhibition in Chicago.
- Patent FR-1910-412050 (English title: Airplane)
- Patent GB-1911-1784 (English title: Improvements in or relating to Flying-machines)
- Patent DE-1916-337522
Note: While working on aviation in the 1910s, Junkers continued to secure dozens of engine-related patents, from Germany, Austria, France, Britain, Denmark, Canada, and the US. See espacenet search.