. . . . . . . . . . . . . . . . . "Elmer Ambrose Sperry" . . . . . "Sperry" . "Elmer Sperry" . "the inventor and entrepreneur" . . . . . . . . . . . . . . . "Elmer Ambrose Sperry" . . . . . . . . . . . "1930" . "1860-10-12" . . . . . "1860" . . . . "1930-06-16" . . . "Sperry, Elmer Ambrose" . . . . . . . . . "Elmer A. Sperry" . . . "E. A. Sperry" . . . . . . "Elmer Ambrose '''Sperry'''" .