Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11193674 | Mobile recirculation grill with plenum and diffuser | Ming H. Pi, Daniel Pi | 2021-12-07 |
| 11060736 | Mobile recirculation grill with variable fan drive | Ming H. Pi, Daniel Pi | 2021-07-13 |