András Mechwart de Belecska was a German-born Hungarian-German mechanical engineer, chief executive of the Ganz Works, and a pioneer in the Hungarian mechanical and electrical engineering. As an inventor and as a businessman he contributed to the development of the Hungarian transport manufacturing industry, and made the Ganz Works a flagship of the Hungarian economy of the 19th century.

Kálmán Kandó de Egerfarmos et Sztregova was a Hungarian engineer, the inventor of phase converter and a pioneer in the development of AC electric railway traction.