Though the ownership of a group's name gives Harvard extensive powers, the trademark office has said its intentions are entirely benign.
Calixto says his office's efforts with student groups pale in comparison to its interactions with manufacturers around the globe.
"We have the strictest licensing in the nation," Calixto said. "We need to control manufacturers, keep stuff out of flea markets."
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Although Calixto has not set a precise timetable for when HSA must start paying royalties, he did not think that HSA would refuse to pay up.
"Since it's our mark, we can say, 'You can't sell it,'" he said. "HSA can't just exploit the Harvard trademark without some impunity."