The CAT scan
The Computed Axial Tomography scan (CT scan), better known as the CAT scan, was invented by Allan MacLeod Cormack. He shared the 1979 Nobel Prize in Physiology or Medicine with his associate Godfrey Hounsfield for his work on X-ray CT.
South African engineer George Montague "Monty" Pratley invented Pratley Putty in the early 1960s. He developed the world's first epoxy putty with the assistance of chemist Frank Robinson.
Even NASA used it