Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9322216 | Annulus ring hole drill | Kin Choi Chan | 2016-04-26 |
| 9175517 | Method and apparatus for controlling the operation of cluster drill of down-the-hole hammers | Kin Choi Chan | 2015-11-03 |
| D485392 | Lighter | Tat Chan | 2004-01-13 |
| 6142767 | Childproof cigarette lighter | — | 2000-11-07 |
| 6099297 | Childproof cigarette lighter | — | 2000-08-08 |
| 5743725 | Safety lighter | — | 1998-04-28 |
| 5538417 | Cigarette lighters | — | 1996-07-23 |
| 5387101 | Cigarette lighters | — | 1995-02-07 |