Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7785732 | Lithium rechargeable battery having functional center pin | Seok-Gyun Chang, Yoo-Eup Hyung, Jung-Seog Kim | 2010-08-31 |
| 7749642 | Lithium rechargeable battery with functional center pin | Seok-Gyun Chang, Yoo-Eup Hyung, Jung-Seog Kim | 2010-07-06 |