Why don't graduate tutors allow patents?

The research depth is not up to the published standard. Postgraduates are a kind of academic qualifications in higher education and the last stage of academic education in China, which can be divided into master's degree and doctor's degree. Postgraduate tutors are not allowed to grant patents because the research depth does not reach the published standards, and tutors are responsible for the students' research results. However, if a paper or research project fails to achieve the expected results, or the innovation is insufficient, the content is not deep enough and other reasons.