Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6821444 | Self-cleaning fuel oil strainer | David A. Laing | 2004-11-23 |
| 6712981 | Method of cleaning a cylindrical water strainer utilizing reverse flow and ultrasonic energy | David A. Laing | 2004-03-30 |
| 6676834 | Self-cleaning water filter | David A. Laing | 2004-01-13 |