Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7043238 | CDMA terminal for providing roaming service to GSM service subscriber in CDMA service area | Byung-Ik Ahn, Chan Ho Yun, Yuon-Pil Jeung, Kwang-Wouk Lee, Seong-Jin Choi | 2006-05-09 |
| 6681111 | Roaming service system for GSM service subscriber in CDMA service area, and method for registering locations and transmitting and receiving signals and short messages using the system | Byung-Ik Ahn, Chan Ho Yun, Yuon-Pil Jeung, Kwang-Wuk Lee, Seong-Jin Choi | 2004-01-20 |