Can the parent company's patent subsidiary be used?

Legal analysis: cannot be used directly. Subsidiary and parent company are two different legal entities. You can authorize yourself. You can use it after authorization without affecting yourself.

Legal basis: People's Republic of China (PRC) Patent Law.

Article 7 No unit or individual may suppress an inventor or designer's application for a patent for non-service invention-creation.

Article 8. Unless otherwise agreed, the right to apply for a patent belongs to an invention-creation completed in cooperation with two or more units or individuals, or an invention-creation entrusted by other units or individuals. After the application is approved, the applicant unit or individual shall be the patentee.

Article 10 The right to apply for a patent and the patent right may be transferred.

Where a unit or individual in China transfers the right to apply for a patent or the patent right to a foreigner, foreign enterprise or other foreign organization, it shall go through the formalities in accordance with the provisions of relevant laws and administrative regulations.

Where the right to apply for a patent or the patent right is transferred, the parties concerned shall conclude a written contract and register it with the patent administration department of the State Council, which shall make an announcement. The transfer of the right to apply for a patent or the patent right shall take effect from the date of registration.