Beyond critiques on aesthetics, users have commented on its use of the “pi” and its seemingly forced symbolic meaning. ‘Pi’ is generally known as a mathematical symbol, and many thought it ...

For 15 minutes, 448 students and staff, all wearing blue shirts, stood in pi symbol formation in the school gymnasium. It was well above the current record of 250 people.

In January, the U.S. Patent and Trademark Office gave Ingrisano a trademark on the symbol π.—pi followed by a period—a design Ingrisano uses on T-shirts sold at some brick-and-mortar stores.