Fuller was married to Willmine Fuller. They had three children, Robert W. Fuller, Stephen Fuller, and John Fuller and eight grandchildren. Fuller moved to Vero Beach, Florida when he reached age 65 and was subject to mandatory retirement from Bell Labs.
Fuller, who was married to Willmine Fuller, had three sons: Robert W., Stephen, and John. He also had eight grandchildren. At the age of 65, Fuller moved to Vero Beach, Florida, and was subject to mandatory retirement from Bell Labs.