TVXQ’s U-KNOW, also known as Jung Yunho, applied for a patent related to masks.
According to the official website of the Korean Intellectual Property Office, U-Know registered a patent for the mask design on the 16th under his real name Jung Yunho.
The mask is conveniently made to drink beverages with a cover that can be opened and closed at the center.
An official of SM Entertainment confirmed that “U-KNOW have applied for a patent regarding his mask design.”
Meanwhile, U-KNOW also applied for a patent on dual-cup design in 2014.