Patricia Bath: inventor of laser cataract surgery -- Bessie Blount: inventor of self-feeding apparatus for the disabled -- Herbert Boyer and Stanley Cohen: inventors of DNA cloning -- Keith Campbell and Ian Wilmut: inventors of cloning technology -- Allan Cormack and Godfrey Hounsfield: inventors of the CT scanner -- Raymond Damadian: inventor of magnetic resonance imaging -- Charles Drew: inventor of the blood bank -- Robert Edwards and Patrick Steptoe: inventor of human in vitro fertilization -- Ashok Gadgil: inventor of the ultraviolet water purification system -- Meredith Gourdine: inventor of a device for purifying the air -- Wilson Greatbatch: inventor of the pacemaker -- Robert Hooke: inventor of various scientific instruments -- Edward Jenner: inventor of the smallpox vaccine -- Percy Lavon Julian: inventor of the glaucoma treatment method -- Dean Kamen: inventor of the autosyringe, Ibot, and the segway -- William Morton: inventor of anesthesia -- Louis Pasteur: inventor of pasteurization.