Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5190061 | Cigarette smoke filter | Warren A. Brackmann | 1993-03-02 |
| 4972853 | Cigarette filter rod elements and cigarettes incorporating such filter rod elements | Warren A. Brackmann | 1990-11-27 |
| 4896682 | Cigarette filter rods and cigarettes incorporating such filter rods | — | 1990-01-30 |