Generally speaking, it is useful. If your patent is related to your major, you will get a lot of extra points, then you will be very lucky. Fortunately, some of the examiners who interviewed you are working in the direction related to your patent. They will be very interested in your patent and may ask you more questions about your patent. If your answer satisfies the interview team, your second interview will be over smoothly. Of course, what I said above is based on the value of your patent. If the value is not too great, I suggest not to mention it, so as not to cause bad influence. Come on (?
_)? ! Good luck!