Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7228861 | Cigarette filter | Fumihiro Omori | 2007-06-12 |
| 6718989 | Filter for a cigarette and a filter-tipped cigarette | Paul Francis Clarke, John Charlton, Atsushi Tokida | 2004-04-13 |
| 6422244 | Filter for a cigarette and filter cigarette | Paul Francis Clarke, John Charlton, Masanori Koborinai | 2002-07-23 |