What is the price of patent change?

Patent change (1) The types of changes include: changes of inventors, applicants and patentees; Changes in the entrustment relationship between patent agencies and agents. (2) Expenses: change of inventor, applicant and patentee 200 yuan. Changes in the entrustment relationship between patent agencies and agents in 50 yuan. The transfer of the right to apply for a patent or the patent right may be registered with the patent administrative department of the State Council after the applicant or the patentee has concluded a written contract with others, and the transfer of the right to apply for a patent or the patent right shall take effect from the date of registration. Materials required for transfer: rights transfer contract and power of attorney signed by both parties.