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Artist Trademarks 'Pi' Symbol, Starts Issuing Cease and Desist Letters

Artist Trademarks 'Pi' Symbol, Starts Issuing Cease and Desist Letters

A Brooklyn artist trademarks the 3,000-year-old mathematical symbol 'pi' and starts flooding math-clothing producers with cease and desist letters. Jen Markham has the story.

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Artist Trademarks 'Pi' Symbol, Starts Issuing Cease and Desist Letters

A Brooklyn artist trademarks the 3,000-year-old mathematical symbol 'pi' and starts flooding math-clothing producers with cease and desist letters. Jen Markham has the story.