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Whether you're protecting your existing rights from a conflicting new application, or defending your own published mark, our team at Brealant guides you through KIPO's opposition process from start to finish.
Legal Definition of Trademark Opposition
Opposition is the formal process, under the Trademark Act of Korea, that lets any person challenge a trademark application after it clears examination and is published, but before it registers.
Purpose and Function of Opposition
It exists to let earlier rights holders, and indeed any interested member of the public, prevent a confusingly similar mark from reaching the register before it can cause consumer confusion.
Protecting Your Position
Whether opposing or defending, a carefully built case — backed by the right evidence and filed within Korea's short two-month window — is essential to a successful outcome before KIPO.
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Contact
Reach out to Brealant to discuss the published mark you want to oppose, or the opposition you need to defend.
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Search
We review the conflicting application or your own registration and the surrounding evidence.
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Quote
Receive a staged service quote covering each phase of the opposition process.
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Pay
Proceed with secure payment for the stage you're instructing us on.
File
Brealant files the Statement of Opposition, supplementary grounds, or evidence, as relevant.
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Wait
Await KIPO's process through each stage of the exchange; timing varies by case.
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Response
Receive the outcome — a decision from KIPO's examiner panel, or a negotiated resolution.
In South Korea, opposition must be filed, with its grounds, within two months of the mark's publication in the KIPO Official Gazette — a single, tightly-timed filing rather than a multi-notice sequence. Supplementary grounds or evidence can generally be added shortly after, followed by the applicant's response and a decision from a panel of KIPO examiners. Knowing exactly where a case sits in that sequence is the clearest way to plan next steps.
Because Korea's opposition window is short and fixed, there's little room for delay once a competing mark is published. Brealant assesses the merits with you quickly, so you can decide whether to oppose — or how best to defend your own mark — well within the deadline.
Opposition is powerful, but it has real limits
Fixed, Short Deadline
The opposition must be filed within two months of publication — this window is generally not extendable, so delay can mean losing the right to oppose.
No Retrospective Effect
Opposition can't undo a mark that has already registered; a separate invalidation trial before the IP Trial and Appeal Board would be needed instead.
Cost and Time
A contested opposition commonly takes around 6 to 12 months to resolve, depending on the evidence exchange required.
Burden of Proof
The opponent must prove its grounds — an opposition without solid evidence is unlikely to succeed.
Partial Outcomes
Opposition may only succeed for some of the contested goods or services, not necessarily all of them.
Brealant gives you a realistic view of the likely outcome, timeline, and cost before you proceed.
A well-run opposition protects a range of commercial and legal interests
Your Existing Brand
Preventing a confusingly similar mark from registering alongside yours.
Consumer Trust
Reducing the risk of customers being misled between your brand and a new entrant.
Market Position
Stopping a competitor from gaining registered rights that could restrict your own future use.
Register Integrity
Ensuring only marks that genuinely meet the legal requirements proceed to registration.
Brealant helps you weigh these interests against the cost and time of a contested opposition before you commit.
Opposition follows a defined, multi-stage process
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Statement of Opposition Filed
Filed within two months of the mark's publication in the KIPO Official Gazette, setting out the grounds relied on.
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Reason Supplement
Additional grounds or evidence can generally be filed within a further short window after the opposition period closes.
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Applicant's Response
The applicant is notified and files a written response defending the application.
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Decision
A panel of KIPO examiners reviews the submissions and issues a decision.
A contested opposition in South Korea commonly runs 6 to 12 months from the Statement of Opposition to a final decision.
Costs scale with how far the matter proceeds
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KIPO charges an official fee to file a Statement of Opposition, generally assessed per class opposed.
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Professional fees depend heavily on whether the matter proceeds to a full evidence exchange or resolves earlier.
Brealant scopes and quotes each stage separately, so you're never committed further than you choose to go.
Brealant manages your opposition matter end to end, keeping you informed at each stage and revisiting strategy as the evidence develops, so you can make informed decisions about whether to continue, negotiate, or settle.
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Any person can file an opposition in South Korea, not only the owner of an earlier conflicting mark — though it is most often brought by parties with a direct commercial interest.
A Statement of Opposition, with its grounds, must be filed within two months of the mark's publication in the KIPO Official Gazette.
The two-month filing window is generally treated as fixed, so it's important to act quickly once a mark you want to challenge is published.
Yes, many oppositions resolve through negotiation — such as a coexistence agreement, amendment, or withdrawal — before KIPO issues a final decision.
If the opposition succeeds, the application is refused, in whole or for the contested goods/services, and does not proceed to registration.
Typical grounds include conflict with an earlier mark, lack of distinctiveness, bad-faith filing, or a mark considered deceptive or contrary to public order under the Trademark Act.
The applicant files a written response addressing the opposer's grounds, and KIPO's IP Trial and Appeal Board considers both sides before issuing a decision.
Registration is held pending the outcome, so a contested opposition can add several months, sometimes longer, to the time it takes to reach final registration.
No — opposition challenges a mark after publication but before registration, while an invalidation trial challenges a mark that has already been registered.
Yes, an unsuccessful party can appeal the IP Trial and Appeal Board's decision to the Patent Court, and further to the Supreme Court if warranted.
Discover more insights and stay informed about the latest in intellectual property with Brealant's blog. From expert advice on trademark registration and patent protection to strategies for safeguarding your brand in a competitive market, our resources are here to empower your business. .
Explore our blog to learn how effective IP management can strengthen your brand's position and protect your innovations
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