George Westinghouse was an American entrepreneur and engineer, best remembered for inventing the railway air-brake system and the alternating current (AC) power supply. The air-brake system was a revolutionary invention, as it was much safer than applying brakes manually, a system that was prevalent back then. The invention not only developed the safety standards of the American railroad system but also provided a push to the transportation industry. Westinghouse established a company to commercialize his inventions and those of others. He introduced the better, cost-effective, and less harmful AC distribution system. However, Thomas Edison and his supporters protested against the system. The protest later turned into a long legal feud. A pioneer of the electrical industry, Westinghouse, and his collaborators won the legal battle. Soon, AC distribution, along with his other inventions, were patented and granted permission to be manufactured for commercial purposes. Westinghouse came up with over 300 inventions and controlled more than 60 companies in his lifetime.