Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6821334 | Process for producing sulfonated solid particles | Michiel Nakamura, Yoshiyuki Zama, Atsushi Nogami, Naoyuki Sakai, Hideyuki Koiso | 2004-11-23 |
| 6726762 | Finely divided pigments and coloring compositions | Yutaka Nakagawa, Yoshiyuki Zama, Koji Tsuchiya, Shotoku Takami, Yoshio Abe +1 more | 2004-04-27 |