What are the common methods for investigating the evidence of intellectual property infringement?

Legal analysis: collect evidence by yourself, entrust a lawyer to investigate and collect evidence, entrust an investigation company to collect evidence, notarize the evidence through a notary office, apply to the court for pre-litigation evidence preservation, apply to the court for obtaining evidence, and apply to the administrative organ for investigation and evidence collection.

Legal basis: Several Provisions of the Supreme People's Court on Evidence in Intellectual Property Civil Litigation.

Article 2 The parties shall provide evidence for their claims. The people's court may, according to the trial of the case, apply the provisions of the second paragraph of Article 65 of the Civil Procedure Law, and require the parties to provide relevant evidence according to their claims, facts to be proved, evidence holdings and ability to provide evidence.

Article 12 In preserving evidence, the people's court shall limit itself to effectively fixing the evidence, and minimize the damage to the value of the subject matter of preservation and the impact on the normal production and operation of the evidence holder.

Where the preservation of evidence involves technical solutions, preservation measures such as making on-site inspection records, drawing, taking photos, recording and video recording, and copying design and production drawings can be taken.

Article 20 With the permission of the people's court or the consent of both parties, the appraiser may entrust some testing matters involved in the appraisal to other testing institutions for testing, and the appraiser shall bear legal responsibility for the appraisal opinions issued according to the testing results. Article 29 If the people's court appoints technical investigators to attend pre-trial meetings or hearings, the technical investigators may ask the parties, agents ad litem, persons with specialized knowledge, witnesses, expert witnesses, inspectors, etc. About the technical problems involved in this case.