From 1960–1965, Fairchild was the undisputed leader of the semiconductor market, both technologically and in terms of sales. Early 1965 brought the first signs of management problems. In November 1965, the creators of integrated operational amplifiers Bob Widlar and David Talbert left for National Semiconductor. In February 1967, they were followed by five top managers who disagreed with Noyce. Noyce started litigation with shareholders and effectively removed himself from the operational management. In July 1967, the company became unprofitable and lost their leading position in the market to Texas Instruments.