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Granville T. Woods, known as 'Black Edison,' invented devices that revolutionized transportation.

United statesMichaelc christopherLucius phelpsThomas edisonLewish latimerFrank spragueShelbyj davisonRayvon fouchGeorge westinghouseNational inventors hallTerms of serviceLedison companyTrademark officeAfrican americanCivil warAfrican americans