Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6080457 | Particulate sorbent smoke filter | John Charlton, Paul Francis Clarke | 2000-06-27 |
| 5012828 | Tobacco smoke filter containing particulate additive | Paul Francis Clarke | 1991-05-07 |
| 4807647 | Ventilated cigarette filter | — | 1989-02-28 |
| 4774972 | Ventilated tobacco smoke filter | — | 1988-10-04 |
| 4492240 | Smoke filter | Anthony S. Cantell | 1985-01-08 |
| 4480649 | Filter device | — | 1984-11-06 |
| 4281671 | Production of tobacco smoke filters | Stanley W. Bynre, Barry J. Tompkins | 1981-08-04 |