Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8353310 | Valves having removable internal actuation mechanisms | Chun Lin, Roy Ronald Pelfrey | 2013-01-15 |
| 6945758 | Drive support and cover assembly for tubeaxial fan | Ronald J. Lievens, Wanlai Lin | 2005-09-20 |
| 6722849 | Propeller for tubeaxial fan | Ronald J. Lievens, Wanlai Lin | 2004-04-20 |
| 6702548 | Tubeaxial fan assembly | Ronald J. Lievens, Wanlai Lin | 2004-03-09 |
| 6648937 | Fan having disposable grease collection cannister | Richard Evers | 2003-11-18 |
| 6289555 | Adjustable hinge assembly | Joseph L. Rehm | 2001-09-18 |