Excuse me, where can I find a patent?

Hello, patent search can be done online for free, and many websites can do it. The most authoritative website is China National Intellectual Property Administration's website, which can search and download domestic patents and patents of all countries that have joined the World Intellectual Property Organization for free. The search method can be patent name, applicant, inventor, keyword, technical field, etc. , you can combine the search criteria for advanced search, and you can view the legal information of the patent, including date, patent transfer, etc. And the original patent can be downloaded for free.