Article 36
When investigating and collecting evidence, the patent administrative department may consult and copy contracts, account books and other relevant documents related to the case; Questioning the parties and witnesses; Conduct on-site inspection by means of measurement, photography and video recording. Where the patent right of a manufacturing method is suspected of being infringed, the administrative department for patent affairs may require the respondent to give a live demonstration.
When investigating and collecting evidence, the department in charge of patent work shall make a written record. The record shall be signed or sealed by the case-handling personnel, the unit or individual under investigation. If the unit or individual under investigation refuses to sign or seal, the case-handling personnel shall indicate it in the record.