Today in 1972, US Patent 3692202 A was issued, an invention of Thomas J. Parlagreco, for his “Beer Can Stein with Attached Handle.” There’s no Abstract, although in the description it includes this summary:
A metal beer can having a pull tab opening on the upper end thereof so to permit a person to drink directly therefrom, the beer can instead of being cylindrical in shape being slightly tapered upwardly so to resemble the configuration of a beer stein, and the outer side of the can having a flat strap placed adjacent thereto, the center of the strap being able to be pulled away from the can so to form a convenient handle for being held in the hand while drinking.