Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4784049 | Whole house fan | Robert E. Steiner | 1988-11-15 |
| 4628802 | Whole house fan | Robert E. Steiner | 1986-12-16 |
| 4596180 | Whole house fan | Robert E. Steiner | 1986-06-24 |
| 4385550 | Whole house fan | Robert E. Steiner | 1983-05-31 |