Many countries in the world produce cars. Karl Benz, of Germany, is widely credited for having produced the first practical internal combustion, petrol-fueled car. This was in 1885. The United States has Ransom Olds to thank for mass-production of cars on his Oldsmobile assembly line in 1902, although often the credit goes to Henry Ford when he made significant improvements and developments on the assembly line concept in 1914.