Edward Thomas Both (1908–1987) was an Australian inventor credited with the development of a number of medical, military and general-purpose inventions. These included a low-cost "iron lung", a humidicrib, the first portable electrocardiograph and the "visitel" – a forerunner to the modern fax machine. His inventions gained him an OBE in 1940, and his work led to Both being given the moniker of the "Edison of Australia".