Who invented the world's first in-line two-cylinder air-cooled motorcycle engine? Can you tell me the process of invention in detail?

A brief history of two-stroke motorcycle

1900 On August 20th, the Frenchman Cormery applied for the patent of the world's first two-stroke motorcycle. The concept of two-stroke engine came into being in the middle of19th century.

190 1 year, another French engine manufacturer, Leon Cordoniere, registered his Ixions Whee brand engine and applied for a patent certificate. The advent of this engine marks the beginning of the production of two-stroke motorcycles. At the same time, Alger a Scott, an Englishman, is working to develop the world's first two-cylinder two-stroke engine. In 1930s, the research work of German DKW Company made great progress. Schnurer obtained the patent of exhaust gas purification technology at 1932, and the two-stroke motorcycle really reached the mature stage.