ThomasAlvaEdisonwasawardedmorepatents(專利)oninventions...
問題詳情： ThomasAlvaEdisonwasawardedmorepatents(專利)oninventionsthananotherAmerican.Whenhediedin1931,Americanswonderedhowtheycouldbestshowtheirrespectforhim.Onesuggestionwasthatthenationobserveamin...