ThomasAlvaEdisonwasawardedmorepatents(专利)oninventions...
问题详情： ThomasAlvaEdisonwasawardedmorepatents(专利)oninventionsthananotherAmerican.Whenhediedin1931,Americanswonderedhowtheycouldbestshowtheirrespectforhim.Onesuggestionwasthatthenationobserveamin...