How to check whether the patent has changed the patentee?

First, how to check whether the patent has changed the patentee? For the inquiry method of national patent invention 1, log on to China National Intellectual Property Administration website or China patent website 2, click "Advanced Search" 3 in the patent search section on the right, enter known keywords, such as patent number or patent name or product, click the search button 4 to get a search list of all related patents, select a patent and enter the specific title page 5 of the patent. If you are prompted to install the plug-in, you will install it as required, otherwise you will not be able to browse the instructions. 6. Click the instruction manual button at the bottom of the patent number to enter the instruction manual page, where you can browse the specific content. 7. Click the Save button in the top line to select the download path, and then select OK to download successfully. Note: If you have already applied, you can follow the steps. If you haven't applied, you can't query. 2. What is the patentee? The patentee refers to the units and individuals who can apply for and obtain the patent right, and is the subject of the patent right. Patentee types Patentee includes three types: 1, the unit where the inventor and designer work. The right to apply for a patent belongs to enterprises, institutions, social organizations and state organs that perform tasks or mainly use material conditions to complete service inventions and creations. 2. Inventors and designers. The right to apply for a patent for a non-service invention-creation completed by an inventor or designer belongs to the inventor or designer. The inventor or designer mentioned in the patent law refers to a person who has made outstanding contributions to the substantive characteristics of invention-creation. In the process of completing the invention-creation, a person who is only responsible for organizing the work, providing convenience for the use of material conditions, or engaging in other auxiliary work is not regarded as an inventor or designer. * * * is the same inventor * * is the same designer. An invention created by two or more units or individuals is called a * * * co-invention, and the person who completed this invention is called a * * * co-inventor or a * * * co-designer. Unless otherwise agreed, the right to apply for a patent for the invention-creation belongs to the inventor. After the application is approved, the patent right belongs to * * * and the inventor. Unless otherwise agreed, the right to apply for a patent belongs to the entity entrusted by other entities to complete the invention and creation. After the application is approved, the patent right belongs to the applicant. In other words, all matters related to patent application, amendment and registration are under the jurisdiction of China National Intellectual Property Administration. If the patentee has changed, the corresponding registration in China National Intellectual Property Administration is the same. However, the related matters of patent inquiry may be the need to submit relevant identity certificates and materials, and the payment standards stipulated in different places are also different.