Today in 1936, US Patent 2042284 A was issued, an invention of Albert E. Ruemmele and Ellsworth J. Westcott, assigned to Freyn Engineering Co., for their “Combination Mash and Lauter Tank.” There’s no Abstract, though it’s described this way in the application:

The invention relates to improvements in brewing apparatus and has reference more particularly to novel mechanism for more effectively performing the mashing and straining operations, and which will make it possible to carry out said operations in a single receptacle to be known as a combined mash and lauter tank.