Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7248015 | Variable speed motor control circuit | Walter William Bowman | 2007-07-24 |
| 7191826 | Variable speed fan motor control for forced air heating/cooling system | Walter William Bowman | 2007-03-20 |
| 6695046 | Variable speed fan motor control for forced air heating/cooling system | Walter William Bowman | 2004-02-24 |
| 6684944 | Variable speed fan motor control for forced air heating/cooling system | Daniel B. Steffen | 2004-02-03 |
| 6070660 | Variable speed fan motor control for forced air heating/cooling system | Daniel B. Steffen | 2000-06-06 |