Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6836653 | Method for applying different charge rates and for indicating location of mobile station in cellular mobile telecommunication system | — | 2004-12-28 |
| 6002917 | Reference channel maintenance method for a wide area paging system | — | 1999-12-14 |
| 5780739 | Tuning fork type gyroscope | Young-Ho Cho, Ci-moo Song, Sung-Kie Youn | 1998-07-14 |