Today in 1956, US Patent 2771752 A was issued, an invention of Edward E. Tennant, assigned to the Schlitz Brewing Co., for his “Beer Cooling Apparatus.” There’s no Abstract, although in the description it includes this summary:

This invention relates to a beverage cooling system and apparatus and particularly has reference to apparatus for cooling or maintaining a carbonated beverage, like beer, in a properly cooled condition while transporting the same a substantial distance from the source or keg to the dispensing tap.