Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4236871 | Centrifugal fan impellers with blades secured between plates | Anthony J. Duthie | 1980-12-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4236871 | Centrifugal fan impellers with blades secured between plates | Anthony J. Duthie | 1980-12-02 |