Clinton H. Blackburn (1916-1993) was a mechanical engineer with E.I. du Pont de Nemours & Company. Blackburn's papers are a sample of work-related materials he retained upon retirement.

Michael Somerville Withers (1926-1985) was a mechanical engineer and an inventor. He worked at the DuPont Company from 1953 to 1983. Withers is the holder/co-holder of fourteen United States patents for plastic laminates and heat exchangers. Withers's papers document his career with the DuPont Company on plastic laminates, heat exchangers, and seal rings. The papers are organized into seven series: Sabine River Works; Experimental Station; Nafion Laminator; Heat exchangers/heaters; Vespel seal rings; Pneumatic tension device; and Trade catalogs, pamphlets, and articles.