Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D622161 | Aquarium clock | Stephen Ching-Sing Yen | 2010-08-24 |
| D622162 | Aquarium clock | Stephen Ching-Sing Yen | 2010-08-24 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D622161 | Aquarium clock | Stephen Ching-Sing Yen | 2010-08-24 |
| D622162 | Aquarium clock | Stephen Ching-Sing Yen | 2010-08-24 |