Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5101840 | Dye for cigarette wrapper paper and cigarette having dyed wrapper | — | 1992-04-07 |
| 4917121 | Smoking article | Robert R. Johnson | 1990-04-17 |
| 4898191 | Smoking device | Robert R. Johnson | 1990-02-06 |
| 4646762 | Cigarette having a mouthpiece | Robert R. Johnson | 1987-03-03 |
| 4643206 | Cigarette filter | Martin L. Reynolds, Dorothy M. Frank | 1987-02-17 |
| 4611607 | Cigarette filter | Martin L. Reynolds, Dorothy M. Frank, Andrew McMurtrie | 1986-09-16 |
| 4580584 | Cigarette filter | Martin L. Reynolds, Dorothy M. Frank | 1986-04-08 |
| 4550740 | Mouthpiece for a cigarette and a cigarette having same | — | 1985-11-05 |