Today in 1936, US Patent 2057347 A was issued, an invention of Daniel J. Reed, for his “Beer Barrel.” There’s no Abstract, although in the description it includes these claims:

This invention relates to a metal beer barrel.

The principal object of the invention is to provide means for absorbing blows and sudden shocks delivered longitudinally of the barrel on 5 the end edge, thereby preventing injury to the body of the barrel and to the lining material therein.