Science Museum, London
Science Museum Online Stuff: Garrett Morgan
An excellent article about inventor Garrett Morgan including information about his two life-saving inventions: the Safety Hood, an early gas mask, and the traffic light.
Houghton Mifflin Harcourt
Harcourt: Biographies: Otis Boykin 1920 1982
Otis Boykin was a successful African American inventor whose inventions include resistors for electrical equipment and missiles, a controller for pacemakers, and a burglar-proof cash register.