In item B, the patent can only be granted after the legal examination procedure of the legal institution, rather than being automatically obtained after the invention. After the patent is granted, if someone thinks that the patent has been improperly granted, the law also sets up a special right confirmation mechanism, that is, the patent invalidation request review procedure initiated by the claimant. The exercise of patent right needs to disclose the authorized content of patent application as a necessary condition. Copyright is automatically obtained from the date of completion of the work.