An early patent for that automatic transmission was granted to Canadian inventor Alfred Horner Munro of Regina in 1923.[20] Being a steam engineer, Munro intended his system to work with compressed air in lieu of hydraulic fluid, and so it lacked electricity and in no way discovered commercial application.[21] https://gearbox-kereta-auto19630.pages10.com/gearbox-auto-fundamentals-explained-67838994