Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6739344 | Biodegradable cellulose acetate structure and tobacco filter | — | 2004-05-25 |
| 6571802 | Molded article of biodegradable cellulose acetate and filter plug for smoking article | — | 2003-06-03 |
| 5913311 | Cigarette filter and filter material therefor | Katsutaka Ito, Tsuruyoshi Matsumoto, Atsushi Tokida, Tetsuro Shibata | 1999-06-22 |