https://www.epo.org/en/service-support/faq/searching-patents/asian-patent-information/china/general-information-about-4
What is the difference between "service" and "non-service" inventions in China?
In China, a service invention is an invention made by an employee of a company in the performance of his duties. In such cases, the right to apply for a patent belongs to the company, which will also be the patent holder after grant. Non-service inventions are those made by individual inventors.
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