Classical type of espresso apparatus

Official title: {classical type of espresso apparatus, e.g. to put on a stove, i.e. in which the water is heated in a lower, sealed boiling vessel, raised by the steam pressure through a rising pipe and an extraction chamber and subsequently is collected in a beverage container on top of the water boiling vessel}

A47J31/303 (Classical type of espresso apparatus) appears on 52 US grants and 70 published applications in this corpus.