Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6276900 | Multiple fan system having means for reducing beat frequency oscillations | Douglas Wallace | 2001-08-21 |
| 6270319 | Multiple fan having means for reducing beat frequency oscillations | Douglas Wallace | 2001-08-07 |
| 6257832 | Multiple fan system having means for reducing beat frequency oscillations | Douglas Wallace | 2001-07-10 |