A: These are the following methods.
(1) Thailand Trademark Database
https://www.wipo.int/branddb/th/en/
This is the official database of the Department of Intellectual Property, Ministry of Commerce (DIP).
The trademark database used to be a registration system and was subject to fees and users were limited to Thai residents only.
But these restrictions have been repeal. However, the database language is available only in the Thai language.
(2) ASEAN TMview
http://www.asean-tmview.org/tmview/welcome
The search for trademarks in 9 ASEAN countries is available. The countries included are Brunei, Indonesia, Cambodia, Laos, Malaysia, Philippines, Singapore, Thailand, and Vietnam.
(3) FOPISER
https://www.foreignsearch.jpo.go.jp/
This is a foreign patent information inquiry service provided by the Japanese Patent Office.