Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5891336 | Rolled threaded filter bowl | Mark E. Rudzik | 1999-04-06 |
| 4426284 | Filter condition indicator | Samuel S. Mitchell | 1984-01-17 |
| 4325824 | Unhooking dirty filter alarm | Samuel S. Mitchell | 1982-04-20 |