These assorted photographs of Wallace Coulter span the 1940s to the 1990s. Other identified individuals include Jeanne O'Laughlin and Inez Andres, at a Barry University commencement. A photo at the American Association of Clinical Chemists may date to 1992, based on the photographer, rather than the copyright date listed.

Wallace H. Coulter (1913-1998) enumerated the Coulter Principle for counting and sizing particles suspended in a fluid. He patented the Coulter Counter for blood cell analysis in 1953 and co-founded Coulter Corporation with his brother, Joseph. The corporation was acquired by Beckman Instruments in 1997.