Documents required to apply for a patent:
Request letter (the application form can be downloaded from the website of the State Intellectual Property Office), application documents (description, claims, drawings, abstract, summary Attached drawings), application fee and publication printing fee (can be paid back within two months).
Applying for a patent is a very complicated legal process. Since you know nothing about it, it is recommended that you entrust a patent agency to help you apply, including writing application documents.
There is a fee to apply for a patent. The official application fee is only a few hundred yuan, but if you entrust an agent, it ranges from a few thousand to more than 10,000 yuan. In order to successfully authorize and ensure subsequent rights stability, it is still necessary to entrust an agency.