Understanding KIPO’s Phonetic Rejection CCriteria In South Korea can be difficult, especially when you want to Avoid Trademark Rejection. I’ve concocted a Phonetic Insights for Foreign Brands in South Korea.
If your trademark application was rejected in South Korea, phonetic similarity is one of the most common reasons foreign founders never see coming. Your brand name can look completely different from an existing Korean trademark and still get rejected because of how it sounds in Korean.
This guide explains how KIPO applies phonetic rejection rules and what you can do about it.
What Are KIPO Phonetic Rejection Rules?
KIPO does not only compare how trademarks look. It also compares how they sound when pronounced in Korean.
Even if your brand name is written in English, KIPO will convert it into Hangul and check whether it sounds similar to existing registered or pending marks. If the similarity is likely to cause confusion for Korean consumers, your application will be rejected.
This rule applies to foreign brand names filed in Roman characters and to logos that include text.
Why Does Korea Apply Phonetic Similarity Rules?
Korean consumers usually encounter foreign brand names through their Korean pronunciation rather than the original spelling. Because of this, KIPO evaluates trademarks based on how an average Korean consumer would hear them.
For example, the names “Latte” and “Ladde” may look different in English, but they sound almost identical when written in Hangul as 라떼 and 라데. KIPO considers this kind of similarity during examination.
How Does KIPO Transliterate Foreign Brand Names?
KIPO uses official romanization rules to convert foreign names into Hangul. However, it also considers how Korean consumers actually pronounce the name in daily life.
This means one English brand name can generate multiple Hangul versions. All of them are checked against existing trademarks.
For instance, the name “Kevin” becomes 케빈 in Hangul. If 케빈 is already registered in your target class, your application for “Kevin” can be rejected on phonetic grounds.
What Level of Similarity Leads to Rejection?
KIPO does not require an exact match to reject an application. The standard is whether the marks are similar enough to cause confusion among ordinary consumers.
In practice, marks that share the same core sounds are at high risk, even if the beginning or ending syllables are slightly different. A single syllable difference from an existing mark in the same class can be enough to trigger rejection.
Which Types of Marks Are Most at Risk?
Short brand names are the most vulnerable. With fewer syllables, even a small phonetic overlap creates a strong likelihood of confusion.Common English words such as “clean,” “prime,” “green,” or “star” are also high risk because they already have well-established Hangul equivalents registered across many classes.
Foreign brand names that sound like existing Korean words face additional risk, as KIPO will compare them against both foreign and Korean-language registrations.
How Do You Check for Phonetic Conflicts Before Filing?
You should follow these steps.
- First, convert your brand name into Hangul using both the official romanization and common Korean pronunciation.
- Second, search both versions in KIPRIS Advanced Search across all your target classes.
- Third, check not only for identical matches but also for marks that share core phonetic elements with your name.
- If you find a potential conflict, assess whether it is in the same class and whether it is actively used.
What Can You Do If a Phonetic Conflict Exists?
If you find a phonetic conflict during your search, you have several options.
Modify your brand name slightly before filing. Even a small spelling change can create a different Hangul version and avoid the conflict.
File in different Nice Classification classes where the conflicting mark has no coverage. Pursue a non-use cancellation if the conflicting mark has not been used for three years.
Obtain a legal opinion on whether the similarity is strong enough to cause rejection.
Common Phonetic Rejection Mistakes Foreign Founders Make
Many foreign applicants make these mistakes.Assuming that filing in English protects them from phonetic comparison. Searching KIPRIS only in English and missing Korean-language marks.
Choosing short, generic-sounding brand names without checking existing phonetic equivalents. Believing that visual differences can overcome phonetic similarity.
Under Korean trademark law, phonetic similarity alone is enough for rejection, even if the marks look completely different.
Ready to Check Your Brand Name Before It Gets Rejected? If you are a foreign founder or French brand entering the Korean market, I build your complete trademark strategy, including phonetic clearance analysis, class selection, and filing roadmap, so your application is ready to submit. In English and French.
Contact: jessicaingrid.com
