Legal analysis: Patent preservation refers to the situation that the people's court may make the judgment unenforceable or difficult to enforce because of the behavior of one party or other reasons in civil litigation. A legal system in which preservation measures are taken for patent rights on the basis of the other party's application or self-determination, and the implementation is assisted by China National Intellectual Property Administration. Because patent right is an intangible property right, it is very different from ordinary tangible property in specific preservation means or methods.

Legal basis: Article 67 of the Patent Law of People's Republic of China (PRC). In order to stop patent infringement, the patentee or interested party may apply to the people's court for evidence preservation before prosecution in the case that the evidence may be lost or difficult to obtain later.

When the people's court takes preservation measures, it may order the applicant to provide a guarantee; If the applicant fails to provide a guarantee, the application shall be rejected.

The people's court shall make a ruling within 48 hours from the date of accepting the application; If it is ordered to take protective measures, it shall be executed immediately.

If the applicant does not bring a suit within 15 days from the date when the people's court takes protective measures, the people's court shall lift the protective measures.