Today in 1904, US Patent 764657 A was issued, an invention of William Clasmann, assigned to Pabst Brewing Co., for his “Pasteurizing Apparatus.” There’s no Abstract, although in the description it includes this summary:

This invention relates particularly to apparatus for pasteurizing or sterilizing bottled beer and other products, beverages, food, or perishable substances contained in sealed or closed receptacles-such as bottles, cans, jars, and the like.

The main objects of the invention are to gradually heat the beer or other material to be treated to a pasteurizing temperature, to hold it at that temperature for a certain time and then graduallyT cool it, to save heat, to avoid waste of water, to economize space, and generally to improve the construction and operation of apparatus of the class to which the invention relates.