These four stocks illustrate Warren Buffett's pragmatic, patient approach to investing.Warren Buffett is a legend on Wall Street. Since becoming CEO of Berkshire Hathaway (BRK.A 0.09%) (BRK.B 0.08%) in 1965, Buffett turned a failing textile business into one of the largest companies in the world today. His company has averaged 20% annualized returns since then, crushing the S&P 500's performance over the same period.One key to Buffett's long-term success is his buy-and-hold approach to investing. He focuses ...