How does the parent company own the patent rights of its subsidiaries?

In the application stage, the subsidiary and the parent company are the same applicant; After authorization, the parent company and subsidiary company are the same patentee. When the patent application right and patent right are to be transferred, it is not decided by the parent company, and the transfer is invalid without the signature of the subsidiary company. Both the parent company and its subsidiaries can implement patents, but they cannot separately license others to use them. If the subsidiary is sold by the parent company, the patent right and patent application right should also be divided. Article 15 of the Patent Law stipulates the right to apply for a patent or the patent right, and such stipulations shall prevail. If there is no agreement, * * * someone can exploit the patent alone or license others to exploit it by ordinary license; Where another person is licensed to exploit the patent, the royalties collected shall be distributed among the owners. Except in the circumstances specified in the preceding paragraph, the exercise of all the patent application rights or patent rights of * * * shall be subject to the consent of the owner of * * *.