"Undeserved" patent attribution
This is one of those situations that has an obvious, but unsatisfactory, solution. The supervisor has power over you and can wield it to your disadvantage. I suggest that you just let it ride without complaint. I know it isn't fair, but, as a student you have little recourse or power to change things. 

Know that if you let it go you will get a good, if not perfect, outcome, and that you won't always be "under the thumb" of your supervisor. But having your name on a patent is a positive thing, no matter the rest. 

But he can make if very unpleasant for you if you object. As other questions here suggest this is unfortunately a moderately common issue. 

Treat it as a learning experience and if you make a career in Academia, don't do this sort of thing. And if you wind up with some "power" there, work to assure it doesn't happen in the future, but you have little power now.