The Supreme Court of Thailand recently pronounced its decision to uphold an appeal in a long-running patent battle between two Korean-owned companies in Thailand. The parties to this conflict compete with each other in manufacturing rubber products, such as rubber gloves and boots. The dispute arose because one company attempted to register a famous rubber boot product for use in agriculture to be exclusively owned as a design patent in Thailand. The other company had not filed for protection of the subject product because it had been used in Korea for a long time. The case discussed in this article outlines the circumstances of this contentious legal battle between two Korean companies in Thailand.