"Technische vernieuwing." . . "Emancipatie." . . "Uitvindingen." . . . . "Afro-américain (peuple) inventeur 19e s. 20e s." . . "Schwarze." . . "Negers." . . "African American inventors." . . . . . . . . "Electronic books"@en . . . . . . "The inventive spirit of African Americans patented ingenuity"@en . . . . . . "\"In this important study, former United States primary patent examiner Patricia Carter Sluby pays homage to the inventive spirit of African Americans\"--Page 4 of cover." . . . "The inventive spirit of African Americans : patented ingenuity"@en . . "The inventive spirit of African Americans : patented ingenuity" . . . . . . . . "USA." . . "Erfinder." . . "Afro-américain (peuple) brevet d'invention 19e s. 20e s." . .