Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5692527 | Tobacco smoke filter materials, fibrous cellulose esters, and production processes | Hiroyuki Matsumura, Syu Shimamoto | 1997-12-02 |
| 5690126 | Tobacco filter materials and tobacco filter as produced by using the same | Hiroyuki Matsumura | 1997-11-25 |
| 5678577 | Tobacco filter material and a tobacco filter as produced using the same | Hiroyuki Matsumura, Syu Shimamoto | 1997-10-21 |
| 5663310 | Cellulose acetate solution and process for the preparation of the same | Kazuhiro Shimoda, Masahiko Murayama, Hidekazu Yamazaki, Shu Shimamoto, Hiroyuki Takemoto +1 more | 1997-09-02 |