If you want to inquire about foreign trademark registration information, the following are several commonly used international trademark registration inquiry platforms:

1. International trademark database (WIPO): a database maintained by the World Intellectual Property Organization (WIPO), which provides global trademark registration information inquiry services. You can visit and inquire about trademarks on its official website.

2. EUIPOTrademarkSearch: a trademark database maintained by the European Union Intellectual Property Office (EUIPO), which provides trademark registration information inquiry service within Europe. You can visit and inquire about trademarks on its official website.

3. USPTOTrademarkSearch: A trademark database maintained by the USPTO, which provides trademark registration information inquiry service within the United States. You can visit and inquire about trademarks on its official website.

4. Official website of the State Trademark Office: Trademark offices in different countries usually provide trademark registration information inquiry services on their official websites. You can visit the official website of the Trademark Office of the target country to find and use the trademark inquiry tools provided by it.

please note that different countries and regions may have different interfaces and query methods for trademark registration information query platforms. Before making an inquiry, it is recommended that you first know the trademark registration agency of the target country or region and refer to the guidance and instructions on its official website.

I hope the above information will help you to inquire about foreign trademark registration. If you have any further questions, please feel free to ask.

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