Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4365641 | Cigarette filter | — | 1982-12-28 |
| 4362171 | Cigarette filter | Daniel Verdin Cantrell | 1982-12-07 |
| 4362172 | Cigarette filter | — | 1982-12-07 |
| 4338956 | Cigarette filter | Robert A. Sanford | 1982-07-13 |