Can colleges and universities invest in enterprises without invention patents?

If technology is shared, there is no guarantee without patents! When new shareholders come in, they can just squeeze you out. You said that the technology shares, there is no relevant document to prove that the technology is yours, and we only came into contact with such a case not long ago. Therefore, technology shares must have patents, and their own patents are appraised by authoritative organizations, which is the safest way for technology shares. If you have any questions, I hope I can help you.