Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D431641 | Humidifier | — | 2000-10-03 |
| 6015265 | Box fan with air divider ring | William E. Lasko, Ralph Zwakenberg | 2000-01-18 |
| D413685 | Box fan | William E. Lasko, Ralph Zwakenberg | 1999-09-07 |
| D407478 | Box fan | — | 1999-03-30 |