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Subject Portraits, American Remove constraint Subject: Portraits, American

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    • 1990s

    The office pictured was in Arnold Beckman's home; he was 93 when the photograph was taken. The two color photographs were taken during his 90th birthday celebration.

    Dr. Arnold O. Beckman (1900-2004) invented the first…

    • Undated

    Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a long career manufacturing scientific and medical instruments with National Technical Laboratories,…

    • 1980s

    Some photographs are inscribed with details regarding dates and the occasion for the photograph.

    Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a…

    • 1970s

    Some photographs include more specific dates or notes, including an image's use in the 1973 annual report.

    Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus…

    • 1963 – 1966

    Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a long career manufacturing scientific and medical instruments with National Technical Laboratories,…

    • 1960 – 1962

    Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a long career manufacturing scientific and medical instruments with National Technical Laboratories,…

    • 1950s

    Some of the portraits bear a photographer's stamp or more specific date (occasionally contradicting other prints of the same photograph).

    Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful…

    • 1945

    Dr. Arnold O. Beckman (1900-2004) invented the first commercially successful electric pH meter in 1934 and thus began a long career manufacturing scientific and medical instruments with National Technical Laboratories,…

    • Undated

    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.

    Joseph R. Coulter, Jr.…

    • Undated

    Joseph R. Coulter, Jr. (1924-1995) co-founded Coulter Corporation with his brother, Wallace, in the 1950s. The company was acquired by Beckman Instruments in 1997.