Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6006969 | Belt holder for portable phones | — | 1999-12-28 |
| 5833100 | Cellular phone holder | — | 1998-11-10 |
| 5082694 | Method for manufacturing a vessel for storing radioactive waste | Yun Seok Chang | 1992-01-21 |