Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6718989 | Filter for a cigarette and a filter-tipped cigarette | Paul Francis Clarke, John Charlton, Ichiro Atobe | 2004-04-13 |
| 5913311 | Cigarette filter and filter material therefor | Katsutaka Ito, Tsuruyoshi Matsumoto, Tetsuro Shibata, Yoichiro Yamashita | 1999-06-22 |