Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4578053 | Tobacco-smoke filters | — | 1986-03-25 |
| 4535793 | Smoking article filters | — | 1985-08-20 |
| 4527572 | Tobacco smoke filters | — | 1985-07-09 |
| 4525161 | Method for producing tobacco smoke filters | — | 1985-06-25 |
| 4481954 | Cigarettes | Kenneth John Maclean | 1984-11-13 |
| 4480644 | Manufacture of cigarettes | — | 1984-11-06 |
| 4478229 | Smoke filters | — | 1984-10-23 |
| 4476882 | Tobacco smoke filters | — | 1984-10-16 |
| 4388934 | Filters | — | 1983-06-21 |
| 4364403 | Smoke filtration | Henry G. Horsewell | 1982-12-21 |
| 4292032 | Production of tobacco-smoke filters | — | 1981-09-29 |
| 4273600 | Bonding fibrillated polypropylene smoke filter with ethylene-vinylacetate emulsion | — | 1981-06-16 |
| 4219033 | Tobacco-smoke filters | Henry G. Horsewell, John D. Green, Stanley M. Candlish | 1980-08-26 |
| 4213470 | Tobacco-smoke filters | Henry G. Horsewell, John D. Green, Raymond J. Harrison | 1980-07-22 |