Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11972435 | Method, apparatus, and system for transmitting and receiving information by using QR code | — | 2024-04-30 |
| 11367078 | Method, apparatus, and system for transmitting and receiving information by using QR code | — | 2022-06-21 |
| 8613913 | Self-molding permanent agent and method for proceeding free-rod and free-band type permanent | Tae Sun Chang, Tae Soon KIM, Wan Je Woo | 2013-12-24 |
| 6924387 | Solid catalyst with core-shell catalytic phase and a method of preparation thereof | Tae Sun Chang, Deug-Hee Cho, Guijia Li, Young Kil Lee | 2005-08-02 |
| 6410800 | Process for preparing acrolein | Tae Sun Chang, Deug-Hee Cho | 2002-06-25 |