"What machine, that enables a person to breathe when the work of breathing exceeds their ability to do so, was invented by Phillip Drinker and Louis Agassiz Shaw in 1928 and improved upon by John Haven ""Jack"" Emerson in 1931?"
Negative pressure ventilator Drinker respirator Iron lung Iron Lung
negative pressure ventilator drinker respirator iron lung
iron lung
WikipediaEntity
Iron lung