Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9914656 | Self-sinking aeration hose | Tak Kwong Kwan | 2018-03-13 |
| 9915390 | Self-sinking aeration hose | Tak Kwong Kwan | 2018-03-13 |
| 9896362 | Self-sinking aeration hose | Tak Kwong Kwan | 2018-02-20 |