Today in 1978, US Patent 4068005 A was issued, an invention assigned to Miller Brewing Company, for the “Accelerated Fermentation of Lager Beer.” Here’s the Abstract:

A method of accelerating the fermentation of a lager-type beer comprises conducting the fermentation at an elevated temperature with or without exogenous agitation while maintaining the dissolved carbon dioxide concentration in the fermentation liquor at a level approximating that found in a fermentation liquor during a normal supersaturated lager-type bottom-fermentation. The level of dissolved carbon dioxide is maintained at about 1.5 to about 2.0 cc per cc of beer by use of an overpressure of 2-20 psig of carbon dioxide.