This case was related to a trademark infringement dispute. The suspected infringing goods were the 2080 toothpastes produced by Aekyung Industrial Co. Ltd. 2080 toothpaste is well-known in Korea. In Korea, this product has had the largest sales amounts in previous 5 years and occupied 30% of the market share.

The defendant in this case was represented by Kangxin Partners. Kangxin successfully used the defense of prior use right and won the suit in the first instance. The result had a great impact in the field of trademark law because of the continuous arguments on the application of the prior use defense in the trademark infringement claim.