According to relevant information, patents are registered in various countries, and there is no worldwide patent office. There is no technical obstacle for South Korea to register Spring Festival couplets in the Korean Patent Office, but it is difficult to succeed.
However, looking around, South Korea has never said anything original. It has always been a replica of the Central Plains civilization, which makes Koreans feel inferior, but the improvement of their economic status makes Koreans very arrogant. No wonder inferiority and arrogance are twin brothers. Many things of China's traditional culture have been shamelessly applied by Koreans. I remember that it was the "Dragon Boat Festival in China" that made a lot of noise on the Internet. In 2005, Koreans successfully applied for the World Heritage in UNESCO. Of course, this is a rumor. South Korea's application for Gangneung Dragon Boat Festival is different from China Dragon Boat Festival. The central media People's Daily posted a rumor.