1. American trademark inquiry network (link: Trademarks | USPTO), this tool is more commonly used.
% 3a 9080/tmois/wscxsy _ getindex . XHTML
Hong kong:/
United States: /numberSearch%3Flocale%3Den_EP
EU Appearance Patent Inquiry:/? target=/singleLineSearch？ locale=en_EP
Patent inquiries in Germany, France, Japan and other countries: /numberSearch%3Flocale%3Den_EP