Horseless carriage days, c1937 (2nd ed.): t.p. (Hiram Percy Maxim) p. xiii (inventor of Maxim silencer; d. Feb. 17, 1936) ch. 1 (began work on gasoline-engine-propelled mechanical road vehicles in 1892 when he was in his early 20's)

OCLC database, 9/15/98 (hdg.: Maxim, Hiram Percy, 1869-1936; usage: Hiram Percy Maxim)

Maxim Silencer Company records, 1912-1956: (Hiram Percy Maxim; born September 2, 1869 at Brooklyn, N.Y.; died February 17, 1936 at La Junta, Colo.; engineer and inventor; invented the silencer for firearms; founder and president of The Maxim Silencer Company at Hartford, Conn., 1912-1936; the company came to specialize in silencers for large engines and similar industrial equipment rather than for firearms)