Willis Carrier
Willis Haviland Carrier (November 26, 1876 – October 7, 1950) was an American engineer, best known for inventing modern air conditioning. Carrier invented the first electrical air conditioning unit in 1902. In 1915, he founded Carrier Corporation, a company specializing in the manufacture and distribution of heating, ventilation, and air conditioning (HVAC) systems.
Air caster
The air caster (originally called the air bearing) was invented by Harry A Mackie in December 1961 as the “pendant air bearing load supporting device” for General Motors Corporation as an alternative to the overhead crane, which ran opposed to a rail, creating friction free movement. In November 1963, Mackie, on behalf of General Motors Corporation, filed a patent for an “air bearing support with automatic air flow regulation”. This was the first air caster designed to be used on the ground.