He became a director of Fuller Company upon its founding in 1926, and with his father's death in April, 1929 he inherited sixty percent of the company; the remaining shares were inherited by his brother, C. Thomas Fuller. In November 1939, James W. Fuller IV was elected president of Fuller Company and he served as such until August 1954, when the concern was sold to General American Transportation Corporation (GATX). He served as vice-president of Allentown Portland Cement Company and owned forty percent of its stock until its purchase by National Gypsum Company in 1959. He also served as a director of the National Bank of Catasauqua and after its merger in 1960 he served as a director of the First National Bank of Allentown.

James W. Fuller IV married three times: first to Marguerite Myers, issue: Marguerite, removed to Berkeley. California, married a Mr. Harms; Mary, married first, Rodney Baker of Catasauqua, and second. Dr. Robert Panzer of Ocala, Florida: and James W. V., born July 14. 1936, died December 29. 1936. In December. 1943. Mr. Fuller married a second time. Lucy M. Wint, daughter of Charles J. and Amanda (Stecker) Wint, issue: James Charles, born November 11, 1944. The third marriage was to Florence Steiner, no issue.



James W. Fuller IV resided in the Fuller family home at the southwest corner of Bridge Street and Howertown Road. After the sale of Fuller Company he moved to his beloved Rocky Hill Farms in Allen Township and he then spent the winter months at Boca Raton, Florida. He was a member of the First Presbyterian Church of Catasauqua, and over the years he provided several major gifts to the local community with a minimum of publicity. He also was an active member of the Fairview Cemetery Association.