About 3 Trademarks found that are owned by Yoon Wook

The mark consists of a curved design starting from a sharp point at the top right, extending into a thicker line to the left and then into a thick vertical band down the left side. The design then curves up as a thin vertical line and over to the right and then down the right side as a thick vertical band, finally extending right to another sharp point.

Color is not claimed as a feature of the mark.

The mark consists of the logo "S-BACK", the letter "S" is overlapped; the shadow of the "S" is in black and the front thick "S" is in green; the "-BACK" is in black.