Can I check the details of the patent at the State Intellectual Property Office before a patent transaction? Are all patents available?

Yes, you can check them all. Moreover, a patent registration book can be issued for free. Just apply.

It should be noted that in patent transactions, one must check whether the patent has a limited period.

If you still have any questions that you need to consult, you can Baidu HI me at any time and we will wholeheartedly answer your relevant questions.