Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8377305 | Continuously variable aeration | Fufang Zha, Warren Thomas Johnson, Thomas William Beck, Roger William Phelps | 2013-02-19 |
| 8372282 | Mixing chamber | Fufang Zha, Roger William Phelps | 2013-02-12 |