Thermo King is an American manufacturer of transport temperature control systems for refrigerator trucks and trailers, refrigerated containers and refrigerated railway cars along with heating, ventilation and air conditioning systems for bus and passenger rail applications. Headquartered in the Minneapolis suburb of Bloomington, Minnesota. Thermo King is a subsidiary of Trane Technologies. History Joseph A. "Joe" Numero sold his Cinema Supplies Inc. movie sound equipment business to RCA in 1938 and formed a new entity, the U.S. Thermo Control Company (later the Thermo King LLC), in partnership with his engineer, inventor Frederick McKinley Jones. Jones designed a portable air-cooling unit for trucks carrying perishable food, for which they had obtained a patent on July 12, 1940, subsequent to a challenge to invent a refrigerated truck over a golf game by associates of Numero's, Werner Transportation Co.'s President Harry Werner, and United States Air Conditioning Co.'s President Al Fineberg, resulting in the "Model A" and the founding of Thermo King. The invention ushered in the era of frozen foods, large supermarkets, and the modern restaurant industry. Refrigerated transport made the delivery of fresh produce anywhere in the country a possibility, regardless of the season. The concept of continuous cooling of perishables is often referred to as the "Farm to Fork" cold chain. With mobile refrigeration compressors driven by fuel-powered engines and stationary refrigeration compressors driven by grid-sourced electricity, the food is kept cold from the point of production through to the point of distribution to consumers. In 1942, Jones developed the first portable refrigeration units for troops stationed overseas in World War II. Thermo King also introduced the first gasoline-powered mechanical refrigerated boxcars in the 1940s, which reduced shipping costs, making fresh produce more widely available and affordable for the public. By 1949, annual revenues reached $3 million for the company. With the introduction of diesel engines in refrigerated units in 1958, engine life would out-perform their gasoline-powered counterparts in terms of longevity. Thermo King was not limited to transport refrigeration products, however. Some of the additional products the company built and sold included milk coolers, golf carts, school desks and shopping carts. On March 5, 1966, a group of 75 people associated with the company were among the 113 passengers and 11 crew members who died when BOAC Flight 911 crashed near Mount Fuji, Japan. Company executives and their top dealers were on a 14-day company sponsored tour of Japan