Jack L. Warner Jack L. Warner Jack Leonard "J. L." Warner (August 2, 1892 – September 9, 1978), born Jacob Warner in London, Ontario, was a Jewish Canadian-American film executive who was the president and driving force behind the Warner Bros. Studios in Burbank, California. Warner's career spanned some 45 years, its duration surpassing that of any other of the seminal Hollywood studio moguls. As co-head of production at Warner Bros. Studios, he worked with his brother, Sam Warner, to procure the technology for the film industry's first talking picture. After Sam's death, Jack clashed with his surviving older brothers, Harry and Albert
Harry Cohn The initials officially stood for Cohn, Brandt, and Cohn, but Hollywood wags noted the company's low-budget, low-class efforts and nicknamed CBC "Corned Beef and Cabbage." Harry Cohn managed the company's film production in Hollywood, while his brother managed its finances from New York. The relationship between the two brothers was not always good, and Brandt, finding the partnership stressful, eventually sold his third of the company to Harry Cohn, who took over as president, by which time the firm had been renamed Columbia Pictures Corporation. Most of Columbia's early work was action fare starring rock-jawed leading man Jack Holt. Columbia