Commonly used patent search websites

1. US Trademark Search Network (Link: Trademarks | USPTO), this tool is commonly used.

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·Hong Kong: /

United States: /numberSearch%3Flocale%3Den_EP

EU appearance Patent query: /?target=/singleLineSearch?locale=en_EP

Patent query in Germany, France, Japan and other countries: /numberSearch%3Flocale%3Den_EP