He sold milkshake machines to the McDonald Bros.' burger joint, got curious about their operation & soon made history
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And so, after seven years in business, Dick and Mac sold the theater in... [DOC] [TLE] What Hamburgers and Milkshakes Cost at McDonald's in 1955 ... [PAR] Apr 4, 2016 ... McDonald's existed before thenit was founded by brothers ... milkshake 
machine salesman Ray Kroc as a franchisee after he was ... You can still check 
out that original restaurant in Des Plaines, but don't expect to place an order 
there.