What year did 4 wheel drive come out?

The first practical 4-wheel drive system was developed in 1903 by Ferdinand Porsche for a vehicle called the Lohner-Porsche Mixte. However, it wasn't until the 1930s that 4-wheel drive became more widely used in vehicles, notably with the introduction of the 1936 Ford Model 1/2 Ton 4x4 truck. The technology continued to evolve, leading to the modern 4-wheel drive systems we see today.