Byteme writes: "A number of Zazzle.com users have had their art and products removed from the site after a man named Paul Ingrisano was granted a trademark for 'Pi Productions' using a logo that consists of this freely available version of the pi symbol from the Wikimedia website combined with a period. He made infringement claims against several websites, and Zazzle took down many clothing products that featured designs using the pi symbol. When users called them on it, they locked a public forum thread and said they're evaluating Ingrisano's complaint."
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