Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12244764 | Captioned telephone service system for providing original number service and anti-spam function | Wonjae Cha, John H. Lee | 2025-03-04 |
| 12202731 | Method for preparing silicon composite | Min Sun Kim, Jong Sik Yoo | 2025-01-21 |
| 11546465 | System and method for providing one number service in telecommunications relay service | Sungho Lee, Wonjae Cha | 2023-01-03 |
| 10973356 | Shade suspension apparatus | — | 2021-04-13 |
| 5099854 | Digital wristwatch with the function of a sphygmometer | — | 1992-03-31 |