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patent)
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,
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Trade Mark)
2. Service Mark)
3. Certification Mark)
4. Collective Mark)
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ค.
25 2539 26 2539
27 2539 282539
.1997 1998
ค. 1999 5. Toward the Age of Digital Economy
2522 25232524 2525
2)
2533 25342535 2536
Answer
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