-Mark certified (Certification Mark) is the owner of the certification mark is used or to be used on goods or services of another person. In order to guarantee about goods or services, such as the shell chuan CHIM. Her mother, well, dancing gracefully curving upwards, etc. -Mark (Collective Mark) are trademarks or service marks used or to be used by companies or State enterprises in the same group, or by the members of the co-operative Union, Association, Federation of any other person or organization, group or private, such as the elephant of cement Thailand company limited etc.
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