10. Otis Boykin (1920-1982)

Notable inventions: Electrical resistor, variable resistor, control unit for heart stimulators, burglar-proof cash register, and chemical air filter

Inventor of over 25 electronic devices, Boykin’s biggest contribution to the tech field would be the control unit for the artificial heart pacemaker, which used electrical impulses to maintain a steady heartbeat rate. Other big accomplishments would include the creation of the variable resistor (used in guided missiles) and the improved electrical resistor used in computers, radios, and TVs.