Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4936991 | Accordion pleated fluid filtering element | Horace M. Misturado | 1990-06-26 |
| 4732671 | Diesel fuel filter/water separator | Donald I. Thornton | 1988-03-22 |
| 4636231 | Panel air filter | Donald I. Thornton, James O'Shea | 1987-01-13 |
| 4570604 | Fuel system for a vehicle engine | Donald I. Thornton | 1986-02-18 |
| 4556077 | Switching valve for a fuel supply system | — | 1985-12-03 |
| 4500425 | Pump valve for liquid separator | Donald I. Thornton | 1985-02-19 |
| 4470301 | Probe and drain assembly for fuel oil/water separator | Charles K. Hutchins, Donald I. Thornton | 1984-09-11 |
| 4437986 | Separating device and cartridge therefor | Charles K. Hutchins, Donald I. Thornton | 1984-03-20 |
| 4400864 | Fluid filter | Donald I. Thornton | 1983-08-30 |
| 4324660 | Fluid filter | Donald I. Thornton | 1982-04-13 |
| 4180885 | Windshield wiper | Donald I. Thornton | 1980-01-01 |