Dee ihe ndị ọzọ dị na paragraf a - N'afọ 1852 Elisha Otis mepụtara ihe mbuli e ji echekwa onwe ya, nke na-akwụsị n'onwe ya ma ọ bụrụ na eriri e ji ebu ya agbajie. Mgbe ihe ngosi e mere na 1853 New York World's Fair gasịrị
, ụlọ ọrụ elevator guzobere ntụkwasị obi. Otis Elevator Company hiwere na Yonkers, New York, na 1853 site n'aka Elisha Otis. Mgbe Elisha nwụrụ n'afọ 1861, ụmụ ya ndị nwoke bụ́ Charles na Norton jikọrọ aka wee gaa n'ihu n'azụmahịa ahụ. N'oge Agha Obodo America, a na-achọkarị igwe mbuli ha n'ihi mbupu ihe agha. Ụlọ ọrụ dị iche iche n'Amerịka na-azụ ha. N'afọ 1864, na mmekọrịta nke J.M. Alvord, ụlọ ọrụ ahụ ghọrọ nke a maara dị ka Otis Brothers & Co. N'afọ 1867, Otis mepere ụlọ ọrụ na Yonkers, New York, obodo ebe ụlọ ọrụ ahụ hiwere.