Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6802770 | Ventilating exhaust fan | David M. Larson, Robert G. Penlesky, Daniel L. Karst, Robert A. Chvosta, Alan G. Klug | 2004-10-12 |
| 6488579 | Ventilating exhaust fan | David M. Larson, Robert G. Penlesky, Daniel L. Karst, Robert A. Chvosta, Alan G. Klug | 2002-12-03 |
| 6261175 | Ventilating exhaust fan | David M. Larson, Robert G. Penlesky, Daniel L. Karst, Robert A. Chvosta, Alan G. Klug | 2001-07-17 |