Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5062410 | Downdraft range ventilator | David W. Wolbrink, Alan G. Klug, Gary E. Behm | 1991-11-05 |
| 4610705 | Filter for ductless range hood | David W. Wolbrink | 1986-09-09 |
| 4510851 | Ventilation fan | David W. Wolbrink, Dieter W. Otte | 1985-04-16 |