Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663310 | Cellulose acetate solution and process for the preparation of the same | Masahiko Murayama, Hidekazu Yamazaki, Tohru Shibata, Shu Shimamoto, Hiroyuki Takemoto +1 more | 1997-09-02 |
| 5636542 | Piercing-rolling method and piercing/rolling apparatus for seamless steel tube | Tomio Yamakawa, Chihiro Hayashi | 1997-06-10 |