"Davidson, Royal Page"@en . . "1943Z"^^ . "educator / inventor" . "Colonel Davidson"@en . "1870-10-09Z"^^ . . . "1943-01-16Z"^^ . . "Royal Page Davidson"@en . . "1870Z"^^ . "1870-10-10Z"^^ . . . "Royal Page Davidson (October 9, 1870 \u2013 January 16, 1943) was an American educator and inventor."@en .