If a person's patent can't be found online, does he have no patent?

It is impossible to inquire whether a person has applied for a patent under the following circumstances: First, the inquiry method is wrong, and it is recommended to inquire through official website, and the relevant information cannot be entered incorrectly; Second, the other party has only recently submitted a patent application, and the one just submitted must not be found; Third, the other party has applied for a patent for some time but it has not been made public. For example, invention patents are not required to be made public in advance, and it usually takes 18 months to find them; Fourthly, it is mentioned in the question that I did not apply for a patent. Some convenient patent inquiry websites or platforms are as follows: 1, China National Intellectual Property Administration Platform 2, Wisdom Bud Patent Inquiry Platform 3 and Wisdom Bud Patent Inquiry Platform provide one-stop information service platforms for patent retrieval, analysis and management. The company is committed to making more organizations and institutions around the world understand and use patents more efficiently. 4. China National Intellectual Property Administration, China is the directly affiliated institution in charge of patent work and coordination of foreign-related intellectual property affairs in the State Council. It has intellectual property affairs such as patent application, patent examination, patent protection, patent agency, PCT, integrated circuit, literature service, news trends, laws and regulations, international cooperation, etc. 5. Patent inquiry is a procedure before patent application. Not necessary, but necessary. An effective search report can make the applicant avoid that the right to be protected is not the same or similar to the patent right of the earlier application, and ensure that the applied patent is valid.