Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6945758 | Drive support and cover assembly for tubeaxial fan | Tung K. Nguyen, Wanlai Lin | 2005-09-20 |
| 6722849 | Propeller for tubeaxial fan | Tung K. Nguyen, Wanlai Lin | 2004-04-20 |
| 6702548 | Tubeaxial fan assembly | Tung K. Nguyen, Wanlai Lin | 2004-03-09 |
| 4830274 | Pressure independent VAV valve with pressure dependent backup | Tedd P. Johnson | 1989-05-16 |