Today in 1966, US Patent 3232489 A was issued, an invention of H. L. Buffington, for his “Portable Cooler Cabinet Construction.” There’s no Abstract, although in the description it includes this summary:

The principal object of this invention is to provide a portable cooler or refrigerated cabinet especially well adapted to the dispensing of beverages and for the storage 0 kegs, bottles or containers of beverages in a refrigerated condition in an extremely compact and accessible manner.

A further object of the invention is to provide a cooler cabinet having a complete mechanical refrigerating system incorporated therein in a greatly improved manner and having dispensing faucets independently operable for the dispensing of beer or other beverages from kegs and similar containers under a pressurized gas and for the mixing and dispensing of soft drinks.

A still further object of the invention is to provide a portable refrigerated cabinet having a beer dispensing faucet and/ or a soft drink mixing faucet removably carried by the exterior