Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D921561 | Single cylinder single handle underwater propeller | Dongjian Zhang | 2021-06-08 |
| D921563 | Single handle for single cylinder underwater propeller | Dongjian Zhang | 2021-06-08 |