The Wealthiest Americans You've Never Heard Of

DailyFinance:

Microsoft's (MSFT) Bill Gates, Berkshire Hathaway's (BRK.A) Warren Buffett and Apple's (AAPL) Steve Jobs are all household names in addition to being among the wealthiest people in the country. There are, however, other billionaires, whose companies or products are also among the best-known in the country, yet they live in relative obscurity, unknown to most -- including their best customers.

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