Which engines have been patented by Karl Benz of Germany?

When he learned that the patent of Otto's four-stroke engine had been approved in 1877, he turned to study the two-stroke fixed engine and completed the prototype of 1 in 1878. 1879, he completed the engine that can be put into practical use. 1882 obtained the patent of battery ignition mode and governor. /kloc-moved to mannheim in 0/882 and founded mannheim gas engine company. 1883, he was employed by Rhodes and Esslinger Company, and the company was reorganized into Mercedes-Benz Mannheim Gas Engine Company. 1884, the patent of Otto four-stroke engine was terminated. 1886, the patent of magnetic ignition four-stroke gas engine was obtained soon. 1885, Ben Ci exhibited this engine at the World Expo in Antwerp, Belgium, and it was well received.