I was paid with research grants so I'd assume the school owns the code. I don't know what school you went to, but many (most?) large engineering/research insti

I was paid with research grants so I'd assume the school owns the code. I don't know what school you went to, but many (most?) large engineering/research institutions have a technology licensing office (e.g. http://web.mit.edu/tlo/www/ http://web.mit.edu/tlo/www/) that can check that assumption definitively for you.