Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8073026 | Method and apparatus for controlling carrier envelope phase | Zenghu Chang, Chengquan Li | 2011-12-06 |
| 8014505 | Point-of-sale electronic PIN distribution system | Johng Phil Lee, Sung Hyun Park, Jung Eun Lee, Aleksandr Livshits, Jae Heung Park | 2011-09-06 |
| 7991180 | Tactilely identifiable earphones | — | 2011-08-02 |
| 7539294 | System and method for providing prepaid telecommunication services | Johng Phil Lee, Jae Heung Park, Taesoon Kim, Jong Phil Shin, Han Kwang Cho | 2009-05-26 |
| 7295658 | System and method for providing prepaid telecommunication services | Johng Phil Lee, Jae Heung Park, Taesoon Kim, Jong Phil Shin, Han Kwang Cho | 2007-11-13 |
| 6873690 | System and method for providing prepaid telecommunication services | Johng Phil Lee, Jae Heung Park, Taesoon Kim, Jong Phil Shin, Han Kwang Cho | 2005-03-29 |