T. Boone Pickens is a famous trader and investor specializing in oil-related companies. He earned $1.4 billion in 2005, making him one of the highest-paid hedge fund managers at the time. His BP Capital Management has generated enormous returns for investors.As the price of oil makes all-time highs, investors should take a closer look at the income stocks that Pickens owns. With that in mind, Stockpickr has put together a list of the top dividend-paying stocks of T. Boone Pickens. One of the high-yielding Pickens stocks is ConocoPhillips ( COP), which pays a dividend of 2%. The company is reportedly a front-runner in a bid for a gas reserves project in the United Arab Emirates. Its earnings call is scheduled for Jan. 23. The stock has a price-to-earnings (P/E) ratio of 13 and a P/E-to-growth (PEG) ratio of 0.8. ConocoPhillips stock is also owned by Atticus Capital, a money management firm with $13 billion of assets under management. It also owns Union Pacific ( UNP), with a yield of 1.5%, Burlington Northern Santa Fe ( BNI), with a 1.6% yield, and MasterCard ( MA), which pays 0.3%. Another top stock owned by Pickens is Greenbrier ( GBX), which makes and sells railroad freight car equipment. It just declared its regular quarterly dividend of 8 cents a share, which gives the stock a yield of about 1.7%. The company also just announced that earnings for the latest quarter increased by 41%. The stock has a P/E of 13.3 and a PEG of 0.96. Greenbrier is in the portfolio of the Keeley Small-Cap Value Fund, a five-star Morningstar-rated fund managed by John Keeley. He also owns Valmont Industries ( VMI), which pays a 0.4% yield. Occidental Petroleum ( OXY) is another dividend-paying favorite. The company was upgraded last month by Friedman Billings from underperform to market perform. The stock, which hit a 52-week high on Jan. 3, offers a P/E of 13, a PEG of 1.2 and a yield of 1.3%. Occidental is a favorite of Ken Fisher, a longtime Forbes columnist and manager of Fisher Asset Management, which has $30 billion under management. Fisher also likes Siemens ( SI), which has a yield of 1.3%, Baker Hughes ( BHI), at 0.7%, and Goldman Sachs ( GS), at 0.7%.