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The Bunn-O-Matic Corporation (now called BUNN) was started by George Bunn in the 1950s after his quest to find easier ways to brew coffee. Bunn invented the flat-bottom fluted coffee filter, a design that is still popular today, as well as the pour-over drip coffee maker. Today, BUNN is headquartered in Springfield, Illinois and remains a major world supplier of commercial coffee products and equipment.