Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12407887 | Location-based video service server and system | — | 2025-09-02 |
| 10513765 | Stainless steel having excellent oxidation resistance at high temperature | Sung Chul Cha, Ik Soo Kim | 2019-12-24 |
| 8826880 | Valve for engine and method for treating surface thereof | Sung Chul Cha, Chang-Hyun Shin, Jun Seok Lee | 2014-09-09 |
| 5253208 | Identification circuit for indicating redundant row or column substitution | — | 1993-10-12 |