Sulzer
Sulzer brand was founded by Salomon Sulzer-Bernet in 1775 and in 1834 established as Sulzer Brothers Ltd. (Gebrüder Sulzer). The headquarters was located in Winterthur, Switzerland. Their first diesel engine, built in 1898, was a vertical four-stroke engine with blast-air fuel injection. In 1905 the first reversing 2-stroke marine engine was invented. It led the way to the first valveless 2-stroke engines.