Holger Hesse (1900–1967) was a German engineer. Together with his partner, Danish anesthetist Henning Ruben, he invented the world's first non-electric, self-inflating resuscitator, the Ambu bag, in 1956.
References
Life Science Encyclopedia, Bag valve mask , Henning Ruben MD, 1914–2004, Resuscitation, Volume 64, Issue 3, Pages 253–256,