Today in 1954, US Patent 2665936 A was issued, an invention of Walter G. Moore, for his “Beer Can Handle.” There’s no Abstract, although in the description it includes this summary:

This invention relates to a handle for beer cans and the like, and has for its principal object the provision of a simple, economical, one-piece structure which can be instantly snapped on and off a tin can to provide a handle therefor, and to form a drinking receptacle therefrom.