Macdonald, Thomas Hood
(1859–1911)
Macdonald, Thomas Hood (1859–3 Dec 1911) American inventor, born in Marysville, California. He was a research scientist at the Bridgeport, Connecticut, plant of the American Graphophone Co. and developed many key devices in the cylinder and disc fields. Macdonald was granted 54 individual patents and two as joint inventor with Frank L. Capps. His most important ones were for the Graphophone, Type N—the “Bijou”; it was U.S. patent #569,290 (filed 2 Nov 1895; granted 13 Oct 1896). Later he filed…