Patent protection is regional. Patents filed in the United States are only protected in the United States, while patents filed in China are only protected in China. If you want to buy a patent applied by a foreigner in China, you only need to contact the applicant of this patent. After both parties agree, you can go through the formalities of changing the patentee.
When purchasing a patent, you should pay attention to the following points:
First, if you buy a foreign patent and produce it abroad, you need to go through the formalities of change at a foreign patent office; This situation is different from other countries, and the treatment process is different; Need to find a foreign institution to handle it.
2. If foreign patents are used in China; If this patent is not patented in China, you don't need to buy it. Patents are not protected and anyone can use them.
Third, if you just want to hold it, you can also sign an exclusive license contract with the patentee and file it in the patent office; After the application, only you can implement this patent; The patentee may not implement it.
Buying a patent is to change the procedure of a patentee. The patentee may produce or use the product or method in the patent.
So, for my answer, have your questions been answered?
legal ground
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.