IANAL, but it's complicated because this was(?) produced as part of her employment by Stanford, so arguably Juul took Stanford's work. Stanford is private, it can do what it wants, but what about public universities? Should the public own the IP they fund? IP created by public employees in the US are often released into the public domain. What if a professor from a private school got a government grant? I'm not sure how settled any of this is legally.