1880-1950. "E. J. Sweetland." Inventor and industrialist. He had some 30 inventions, the best known being the Purolator oil filter. At the time of his death he was chairman of the United Filter Corp. As Gen. Mgr. of The Sweetland Filter Press Co., NYC, he wrote TAE on Sept 17, 1915, offering him a free trial of one of their filters. E1536BA. Full name and birth-death years from findagrave. Obituary from the Ogden Standard-Examiner in Bio Files - Obits & bios.Typescript record from California, Death Index, 1940-1997, also in Bio Files - Obits & bios.