Today in 1965, US Patent 3178896 A was issued, an invention of Bjorn P. Sandsto, for his “Beer Keg Cooler.” There’s no Abstract, but the description states that “This invention relates to a new and improved beer keg cooler for use in cooling small beer kegs and other items, characterized by the simplicity of its cooling system and the portability and freedom from moving parts of the cooler itself.”