The transfer of patent application right takes effect.

Legal Analysis: Our country's laws clearly stipulate the transfer of patent rights. The Patent Law of People's Republic of China (PRC) stipulates that if the right to apply for a patent or a patent right is transferred, the parties concerned must conclude a written contract, which will take effect after being registered and announced by the Patent Office. In other words, to transfer the patent right, both parties must sign a contract and make a registration announcement, and the transfer of the patent right will take effect after the contract takes effect. Therefore, the transfer time of the patent right is after the registration announcement.

Legal basis: Article 10 of the Patent Law of People's Republic of China (PRC), the patent application right and patent right can 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.